Who (in you're opinion) is the most powerful trainer on this list?

Oohh, this is going to be tough, just because of the great lineup, and a great question! If I had to pick, I’d have to with Red from the Manga. He is an incredibly skilled and strategic trainer that has battled and caught legendary Pokémon, outsmarted villains and taken down the Elite Four. Between the sheer feats and raw battle experience along with his bond with his Pokémon, I’ll have to go with him overall. While Ash is also super accomplished in the anime, and Nemona’s got serious skills, but Red, I feel, has that edge!

I wonder which in this line would have the most potential if they had to start again?