The regulars we've seen every time we've gone in the last couple of years are Chef Goofy, Pluto, Chip, Dale and Baloo. Then there is a rotating cast of guest stars who show up, including Belle, Alice, the Mad Hatter, Snow White (who is kind of rare), Aurora and the Prince, Jasmine and Aladdin and Minnie. The last time we were there, it was Jasmine and Aurora and the Prince, as well as the 5 regulars. The time before that it was Belle and Alice (though we ddn't get a picture with Alice), and I think Snow White was showing up just as we were leaving. We have been there other times when Alice and the Mad Hatter were making the rounds. I guess it just depends on whomever is available that morning, or whoever is 'assigned' to the Goofy's rotation!! Clairabell (one of our DIS'ers) was at Goofy's in the last 2 weeks and Captain Hook was there, as well as Snow White. I haven't seen Captain Hook at Goofy's since 2000!! But it seems like they are getting more Princesses in there lately to mingle with the furry characters - they have to compete with Ariel's Grotto, after all!
In my Trip Report (link is in signature below), I have pictures from Goofy's ranging from 1992 - 2008, so you can kind of get an idea of who has been there over the years and who is still there. I miss the days of the Beast and the Genie and Roger Rabbit coming to Goofy's!!