Help with my current team

[Matthew.]

Alright, well I've been trying to decide on a last member of my team. I originally had a Drapion but I decided to change it for a Tyranitar which I started to train (level 23 Larvitar now). But I've thought about my options and I'm contemplating whether I should use an Electivire instead. Anyway, any help would be appreciated. Here is my current team so you can decided which Pokemon would mesh the best with them.

Infernape lvl 58
Close Combat
Flare Blitz
Flamethrower
Mach Punch

Gyarados lvl 58
Surf
Ice Beam
Bite
Earthquake

Leafeon lvl 57
Magical Leaf
Quick Attack
Last Resort
Giga Drain

Dragonite lvl 59
Aqua Tail
Thunderbolt
Dragon Rush
Wing Attack

Metagross lvl 55
Meteor Mash
Metal Claw
Psychic
Hammer Arm

I realize that my team is nothing spectacular so any suggestions on another poke and my current ones is greatly appreciated. ;]

 

[Vainz]

You need more support on your team. All you have is that Leafeon, and you arnt even using that as a wall. I would get rid of that Gyrados in favor for a Milotic. It doesnt have a weakness to Rock, and it is more Defensive.