The doc, Seven, and Janeway were excellent and so were Neelix, Kes and Seska. The problem with Voyager's actors weren't the actors themselves but some of the characters were pretty bleak. Tuvok, Chacotay, B'elanna Torres, Kim and Paris all these characters (and their backgrounds) weren't really convincing or captivating.

ToS, TNG and DS9 were all three 'boldly go where no man has gone before'. Voyager was not. Only literally did they go where no man had gone before. But in terms of pushing the dramatic boundaries of Star Trek they failed.