I'm new to conventions, so my list is quite long.
SG1:
Michael Shanks
Ben Bower
Claudia Black
Amanda Tapping
Gary Jones
Beau Bridges
Tony Amendola
Carmen Argenziano
Cliff Simons
David Painful
Atlantis:
David Hewlett
Joe Flanigan
Rachel Luttrell
Tori Higginson
Jason Momoa
Paul McGillion
David Nykl
Rainbow Francks
Richard kind
Film:
Kurt Russell
James Spider
Jaye Davidson