Scoot: Scattergun, Pistol, Boston Basher
Rocketman: Direct Hit (easy mode for Solja), Shotgun, Market Gardener
πro: Degreaser, Reserve Shooter (the most broken gun in the game), Powerjack, The Attendant
Pirate: 'Nade Launcher/Loch n Load (the "I don't want anyone to have fun" weapon), Charge Targe, Eyelander
Fatty: Minigun, Sandvich, GRU
Texas Man: Shotgun, Wrangler, Gunslinger. Yes, I am an awful person, but it's the only way Engineer is fun.
Healing Nazi Guy: Crusader's Crossbow, Medigun/Kritzreig, Ubersaw
Outback Steakhouse Telescope Man: Sniper Rifle, SMG-Kukri/Jarate-Bushwacka
French Guy: Ambassador, Sharp Dresser, Sapper, Dead Ringer. I play Spy pretty much as a mobile Sniper with no fear.