I also forgot Blaziken (physical sweeper or baton passer), Leavanny (Chloryphyll sweeper or baton passer), and sawsbuck (same as leavanny)
So of the 6 slots I have, I need at least one lead, drought support (MegaZardY), one physical attacker, one special attacker, one defog/rapid spinner, and probably 1 support
Leads:
Mienshao (Scout)
Claydol (SR, Sunny Day, Rapid Spin)
Espeon (Magic Bounce, Dual Screens)
Roserade (Tspikes)
Infernape (Anti-lead)
Drought support:
Charizard (duh)
Physical Attackers:
Blaziken (Sun flare blitzes scare the living day lights out of a lot of people)
Darmanitan (Flare Blitz AND U-Turn)
Talonflame (same as above, AND priority brave bird)
Infernape (U-Turn, Flare Blitz, and close combat make a great pivot)
Arcanine (can't U-turn, but has morning sun and better bulk to survive a lot longer)
Victini (V Create, 'nuff said)
Dugtrio (trapper)
Snorlax (Special Wall)
Special Attackers:
Rotom-H (volt switch provides coverage and pivot)
Heliolisk (^ and solar power-which doesn't damage on volt switch)
Venasaur (Chloryphyll)
Heatran (Trapper, great resistances)
Volcarona (Besides fiery dance and quiver dance, bug buzz now hits through subs. Worth noting)
Chandelure (Specs set is a nuke)
Defog/Rapid Spin:
Starmie (Special attacker too)
Crobat (Infiltrator/U-Turn)
Scizor (U-Turn/priority user)
Donphan (Physical Tank/SR)
Flygon (SR resistance/Defog/U-Turn)
Support:
Blaziken (Baton Pass)
Ninetales (another weather setter could be helpful)
*This role could be switched for another role, depending on necessity.
Now for the fun part of narrowing it down. I've already knocked some out, based on this being a singles OU team, but there's still a lot of work to do, and I'm pretty sure I'm STILL forgetting some.
Doing a similar method for my Sand Team, running Sash Galvantula as my lead, then having Tyranitar to set up Stealth Rocks and Sand. Debating M-ChainChomp vs Kyurem-B for my mixed wall-breaker. Excadrill for my spinner and to take advantage of Sand Rush. Calm Mind Keldeo for late game sweeps and either Scizor for a VoltTurn pivot or M-Gengar as a revenge killer if I didn't coose Chainchomp.