It's hard to discern which voice artist he sounds like more because there were two... but sounds like Charlie Adler to me.
this is interesting. sort of describes the vocals on Neon Horse as well...
Voice Actor
Buster was the last and hardest to cast, Buster's original voice actor was Charlie Adler,[1] who Tom Ruegger said "Sometimes he went too gravelly and over the top, but brought a great deal of energy to the role". Steven Spielberg and other producers did not want Adler, but Ruegger and (Voice Caster/Director) Andrea Romano fought for him. ...
... they re-cast with John Kassir. Kassir's voice was slightly different than Adler's, Adler's voice was more gravelly and rough, where as Kassir's was more smooth. Kassir finished the last 10% of Adler's lines from "The Horror of Slumber Party Mountain". He did "The Return of Batduck", and "It's A Wonderful Tiny Toons Christmas Special" in 1992, later "Night Ghoulery", and "Tiny Toons Spring Break Special" in 1994 and 1995.
