so…. WHo is it?

Probably Ray. He retained his extreme enthusiasm for the ghostbusting business, as well as his extensive knowledge of the paranormal. Egon was way too talkative and expressive than he was in the movie, Peter was cocky, but his wittisms were far too clean for him to be like movie Pete. Winston was more tough looking and sounding in the movies than he was in the cartoon. It's Ray who made the best transition to the cartoon world; he even retained the original color flightsuit!

well i would say that one reason that Petes jokes are cleaner than in the movie,from what im guessing,is because RGB was more for the kids and they probably didn't want the children repeating the dirty jokes.but i dont know.

a rundown
winston is still like his movie doppleganger. serious yet willing sometimes funny
egon is a little more intense in the cartoons than in the movie, especially in gb2.
ray did keep his enthusiasm and love for the paranormal like he did in the movie.
peter on the other hand had the most in common with his rgb counterpart.
he had the most jokes and was the same smart-aleck/serious when it called for it. so i will say peter.
ok bye

If I had to pick I would say Ray and Peter. But they all were good.