I suggest using one of the Gokus because Genki Dama is OP(although it's been a little nerefed lately, also because it's sort of hard to set up a hit with an angel, and you gonna get ki blasted at way too many times, with Goku you one shot everyone with the Genki Dama but don't risk geting hit at as much.

I tried it and got through 45 fighters, I think being more careful and using one of the later Goku's because their ki charge is faster would work.