Close, but not quite.
John Vernon played General Thunderbolt Ross in the recent UPN Incredible Huk series (which should have lasted longer). While he did do voice work on the old 1960's Hulk series, it was not Thunderbolt Ross, but Major Talbott!
Not only that, but he voiced Rupert Thorne in Batman: The Animated Series, Dr. Strange in Spider-Man: TAS. He also voiced Tony Stark in the old 1960's Iron Man series, and voiced Sub-Mariner in the old 1960's animated series as well.
And to top it off, he was born in Montreal, Quebec, Canada!
And I assume yer Canadian as well, and are referring to The Hulk airing on Teletoon Retro. Pretty cool, eh?