Need recomendations for last slot

The team I'm building for the vgc format is one member short. I need some recomendations for Pokemon that will give my team better coverage. My lead off is Aurora Veil Ninetales, with Sword Dance Garchomp or Calm Mind Tapu Fini. The team was built to take advantage of Veil to set up and wear down opponents gradually. Here are my sets.

Ninetales-Alola @ Focus Sash
Ability: Snow Warning
Level: 50
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
IVs: 0 Atk
- Freeze-Dry
- Blizzard
- Protect
- Aurora Veil

Garchomp @ Groundium Z
Ability: Sand Veil
Level: 50
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Earthquake
- Rock Slide
- Swords Dance
- Outrage

Tapu Fini @ Sitrus Berry
Ability: Misty Surge
Level: 50
EVs: 100 HP / 100 Def / 136 SpA / 144 SpD / 28 Spe
Modest Nature
IVs: 24 HP / 12 SpD / 15 Spe
- Protect
- Muddy Water
- Dazzling Gleam
- Calm Mind

Magnezone @ Quick Claw
Ability: Sturdy
Level: 50
IVs: 0 Atk
- Thunderbolt
- Discharge
- Flash Cannon
- Thunder Wave

Alakazam @ Alakazite
Ability: Inner Focus
Level: 50
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Calm Mind
- Psychic
- Shadow Ball
- Charge Beam

My Magnezone spread is tailored towards bulky, but it's to random to replicate right now. Any and all help is appreciated.

Therian Landorus outclasses Garchomp as a Ground Pokemon because it provides better utility with Intimidate. All four of the Tapus also give Garchomp a hard time. Volcarona is a threatening setup attacker as well:

Therian Landorus:
-Earthquake
-Stone Edge/Rock Slide/Rock Tomb
-Knock Off
-U-turn/Superpower
Nature: Adamant
EVs: 140 HP/92 Atk/20 Def/4 SpD/252 Spe
Item: Assault Vest

or
-Earthquake
-Rock Slide
-Superpower
-U-turn
Nature: Adamant
EVs: 172 Atk/84 SpD/252 Spe
Item: Choice Scarf

or
-Earthquake
-Stone Edge/Rock Slide/Rock Tomb
-Superpower
-U-turn/Knock Off
Nature: Adamant
EVs: 12 HP/140 Atk/4 Def/100 SpD/252 Spe
Item: Groundium Z

Volcarona:
-Quiver Dance
-Bug Buzz/Overheat/Giga Drain
-Heat Wave
-Protect
Nature: Modest
EVs: 20 HP/52 Def/212 SpA/4 SpD/200 Spe
Item: Firium Z
Ability: Flame Body

Quick Claw is too haxy and luck-based to rely on. Don't bother with it. If you really wanted a bulky Steel Pokemon, look no further than Aegislash:
-Shadow Ball
-Flash Cannon/Sacred Sword
-Wide Guard
-King's Shield
Nature: Modest/Quiet
EVs: 220 HP/4 Def/132 SpA/76 SpD/76 Spe or 220 HP/4 Atk/68 Def/140 SpA/76 SpD
Item: Ghostium Z

or
-Substitute
-Shadow Ball
-Flash Cannon/Wide Guard
-King's Shield
Nature: Modest
EVs: 228 HP/4 Def/188 SpA/76 SpD/12 Spe
Item: Wiki Berry

Alakazam isn't a particularly good Mega to use in VGC because of its immense frailty. Kangaskhan, Metagross, or Salamence are generally better Megas to fall back on; the latter also has a setup move in Dragon Dance:

Kangaskhan:
-Fake Out
-Double-Edge
-Low Kick
-Sucker Punch/Ice Punch/Protect
Nature: Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Kangaskhanite
Ability: Scrappy

Salamence:
-Dragon Dance
-Double-Edge
-Earthquake/Roost
-Protect
Nature: Adamant
EVs: 100 HP/116 Atk/12 Def/60 SpD/220 Spe
Item: Salamencite
Ability: Intimidate

Metagross:
-Iron Head
-Zen Headbutt/Ice Punch
-Stomping Tantrum/Ice Punch
-Protect
Nature: Jolly
EVs: 4 HP/252 Atk/252 Spe
Item: Metagrossite
Ability: Flame Body

Another setup attacker to consider is Clangorous Soulblaze Kommo-o, but be aware it's a high risk/high reward Pokemon since you can only pull off Clangorous Soulblaze once; Aurora Veil can help with this. Despite its frailty, Mega Gengar provides good utility with Shadow Tag and is one of Kommo-o's best teammates to remove Fairy Pokemon before Kommo-o sets up. It should be noted that Kommo-o is better built around rather than just be randomly included:

Gengar:
-Shadow Ball
-Sludge Bomb
-Disable
-Protect
Nature: Timid
EVs: 4 HP/252 SpA/252 Spe or 60 HP/4 Def/140 SpA/52 SpD/252 Spe
Item: Gengarite

Kommo-:
-Clanging Scales
-Close Combat/Low Kick/Focus Blast
-Flamethrower
-Protect
Nature: Modest
EVs: 4 HP/4 Def/180 SpA/68 SpD/252 Spe
Item: Kommonium Z
Ability: Soundproof

Replace the Magnezone's quick claw with an air balloon, air balloon means their Landorus, Zygard cannot just earthquake straight up. Also give it Volt Switch instead of Discharge as that means it can swap out easier.
Give Ninetales light clay instead of focus sash. Ninetales is fast and should out speed pretty much any starting Pokémon.
As for the added Pokémon, try Infernape.

Infernape @ Focus Sash
Ability: Blaze
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stealth Rock
- Blaze Kick
- Thunder Punch
- Close Combat

Hopefully I helped out a little.

Aduitt said:

Replace the Magnezone's quick claw with an air balloon, air balloon means their Landorus, Zygard cannot just earthquake straight up. Also give it Volt Switch instead of Discharge as that means it can swap out easier.
Give Ninetales light clay instead of focus sash. Ninetales is fast and should out speed pretty much any starting Pokémon.
As for the added Pokémon, try Infernape.

Infernape @ Focus Sash
Ability: Blaze
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Stealth Rock
- Blaze Kick
- Thunder Punch
- Close Combat

Hopefully I helped out a little.

Click to expand...

This is a VGC team, which follows double battle rules. Stealth Rock isn't particularly viable in that format because of the fast pace of double battles. Infernape is also outdone by Incineroar and Volcarona as a Fire attacker in doubles because they provide better utility and power in Intimidate/Fake Out/Knock Off and Quiver Dance/Rage Powder, respectively. Mega Charizard Y and Heatran are also much stronger than Infernape is.

PlatinumDude said:

This is a VGC team, which follows double battle rules. Stealth Rock isn't particularly viable in that format because of the fast pace of double battles. Infernape is also outdone by Incineroar and Volcarona as a Fire attacker in doubles because they provide better utility and power in Intimidate/Fake Out/Knock Off and Quiver Dance/Rage Powder, respectively. Mega Charizard Y and Heatran are also much stronger than Infernape is.

Click to expand...

Ah.
My bad, I didn't know what VCG meant embarrassingly enough.
I do agree about Infernape being bad in doubles, I was giving the build and advice assuming it was singles.