Easily demoman, his pills do more damage than soldier's on a direct hit, he basically has 2 primaries, which allows you to be as creative as u want with his loudouts, for ex: hybrid knight, if ur confident with ur pills, then having extra resistances with the charge and targe would make u a tank. and him having 2 primaries makes the sticky jumper really viable, since unlike with soldier, u wont be sacrificing ur primary. and u get insane mobiliy, and crit sticky trapping is extremely good. uber a demo and u can shut down a push or wipe out the enemy ream