That first guy: Patrick Bauchau has a certain instant appeal for an older gent!
Honestly I was of the impression LeVar Burton had the greater fame within the USA and Patrick Stewart lesser so. I have no doubt as good as Stewart was proven to be, another actor would have fitted the bill equally as well.
I think going in that is was true that Burton was the bigger name because of "Roots" and "Reading Rainbow." Actually the biggest name was just having it be made by Roddenberry. The allure of his name still mattered a great deal to people. Stewart though I think became the face of the show and the main reason for it's popularity. Well him and Data. Pillar of course as well but I doubt many people know the writers and so forth who aren't big time fans.
Jason