I did a little checking. The
original Boba Fett was a voice actor named Don Francks who also played Jann Tosh on
Star Wars: Droids amongst a shitload of other voice roles from that era.
Then of course there was Jeremy Bulloch who was the first
live action actor to play the part and
his voice actors were Jason Wingreen and later Temura Morrison.
Then there was Mark Austin who played the part in the
Star Wars: Special Edition.
Then at last came Daniel Logan.
If you want to get
really picky Alan Rosenberg and Ed Begley Jr played Fett in the NPR radio adaptations of the OT.
EDIT: Boba Fett's
FIRST EVER appearance in the Star Wars mythos:
http://www.youtube.com/watch?v=Hhf34nxbkV0
BTW don't for a minute think that just because this segment is pretty good that the SWHS is good because it ain't. Not even a little...