>>95523168I'd say it's down to Welker vs Cummings. It all really depends on how many characters will sound different after they're dead. After Welker's gone, Fred and Scooby won't ever really sound the same.
Cummings goes, and Winnie the Pooh, Pete, Tigger, Taz, and Darkwing Duck are just going to sound wrong forever.
Then again, Rob Paulsen and James Arnold Taylor probably have at least as many classic roles under their belts. They just haven't been in the game as long