My personal ranking:

1. Kevin Conroy

2. Mark Hamill, my vote

3. Susan Eisenberg

4. Tim Daly

5. George Newborn

Sad to rank Superman voices so low, but like most fans, I like Conroy and Hamill's contribution to the characters for the DCAU series and beyond. Truly not many actors (if any) will fill their shoes. Ranking Susan as my #3, well...she is my Wonder Woman as well.

Tim Daly for The Late Mr Kent episode, plus he has this nuance George Newbern didn't have. Kevin Conroy is obvious but he changes his voice from Batman Beyond onward and in the harley quinn movie brings it back. Susan Isenberg was great too, loved her performance in JLU For The man who has everything, This Little Piggy, The Balance, To another shore