Kilua is probably the most balanced character here, maybe Sanji, idk...he can use his godspeed form (whatever it's called) when he uses his final smash for 20 seconds
Sanji, basically has infinite double jumps (what I saw from the showcase)
Future trunks: it looked like he could transform simply by doing a taunt, and can go ssj2 RAGE for as long as you want, and has multiple moves that could probably 0 to death you with just one attack