SpongeBob - Tara Strong
She's done some work as male characters like Timmy. Should do well in SpongeBob.
Will Ryan- His voices for Pete or Wille the Giant could work well.
Tom Kenny-He can do a pretty darn good impression of Squidward. If it wasn't for having to be in-character the times where he did imitate Rodger Bumpass's voice, I feel like he could sound even closer. Sandy - Ashleigh Ball (voice of Applejack and Rainbow Dash). I really like her country accent. Mr. Krabs:
Jim Cummings-I think he could play Krabs well. I love his voice...it very rich. *Bricked*
Frank Welker-He's KING when it comes to animal noises! Why not?