My one friend will play Fizz, and my other will play Darius.
We're figuring out who will be better on the team, for me to play.
We have narrowed it down to two champs. Yorick or rumble.
So, which one do you guys think would best fit this teamcomp?(I will go top, btw, because Fizz needs Darius, and his pull, to protect him and get him kills.)

your gonna want AD so i wouldn't go yorick or rumble but your gonna want to hear that from a top player. yorick is mostly magic cause you poke with his e and w. If I had to choose Id say yorick so you can ult darius ftw.

I'd also go Yorick, though I play him as AD, so I wind up doing a lot of AD damage. Nice thing is, Yorick, with Darius, can help to dominate early games, helping you guys to win before people really start getting beefy. Only issue is, they both tend to fall off a little as the game wears on, so it would really be up to Fizz to complete the damage late. If you can defend him well enough, that team comp should be decent.