User blog comment:SonicFan/Voices you want to hear in Young Justice/@comment-3222191-20120127185315

More I can think of:

AJ Trauth: Look at his imdb page!

Ricky Ullman: He worked with Jesse McCartney in "The King and I".

Frankie Muniz: After watching the movie "The Legend of Secret Pass", I would love to see him work in a DC cartoon.

The four guys from "Big Bang Theory": Ok it sounds unlikely, but it's very obvious why.