Anderson would do ok I think, Machida would be pretty successful if he got more agressive as other people have said. Rampage would do well, he has KO power and good hand skills, and has already been successfull in k1. Gomi,and yamamoto (he knocked down masato so you know he would do well in k1 tournaments).
I don't think franklin has the stand up skills on the level of k1 fighters, so I don't think he would struggle alot. Chuck has bad technique for k1 (too many openings) yeah he has ko power, but the top k1 fighters would exploit those openings and beat him in my opinion.