Lookin' for a Legendary Replacement

[1UpedAngel]

Hello, I'm 1UpedAngel, and I'm looking for some help deciding on a replacement for my current Latios (Quick note, this team is only competitive between me and my friends, so don't go ballistic over something like my Serperior, please. That's just downright dumb of you anyway). It's not that it's bad and I don't like it, but it doesn't seem to fit well into my style of battle, so I'm looking for a replacement (Also, if you have any suggestions for moves on my other Pokemon, that's cool, I'd love to hear them). Anyway, here is the rest of my team:

Serperior (Starter)
Ability: Contrary
Nature: Adamant (Not the best choice, even with Contrary)
Moveset:
-Leaf Storm (duh)
-Taunt
-Toxic
-Aerial Ace (Up for replacement on this)

Jellicent
Ability: Cursed Body
Nature: Bold
Moveset:
-Scald
-Will-o-Wisp
-Recover
-Ice Beam

Arcanine
Ability: Intimidate
Nature: Hardy
Moveset:
-Flare Blitz
-Close Combat
-Wild Charge
-ExtremeSpeed (Who doesn't?)

Jolteon (Thinking of replacing him too, but might not)
Ability: Volt Absorb
Nature: Timid
Moveset:
-Thunder Bolt
-Volt Switch
-Shadow Ball
-Signal Beam

Lucario
Ability: Inner Focus
Nature: Hardy
Moveset: (Thinking of a new one though)
-Nasty Plot
-Aura Sphere
-Dark Pulse
-Ice Punch

and now for the one I wanted to replace, my Latios:

LATIOS (Obviously from a previous game)
Nature: Hardy
Moveset:
-Draco Meteor
-Surf
-Thunder
-Psyshock



Let me know what you guys think should replace Latios! As much as I like him, he just doesn't fit right on my team.