I had some great dim sum at Dumpling Home last month.
My longtime favorite is Yank Sing. Excellent renditions of all the classics plus some original / creative stuff. The branch at Rincon Plaza takes reservations (and honors them, unlike Koi Palace) and has validated parking in the basement.
My Chinese foodie hairdresser who’s a reliable source of tips highly recommended Palette Tea House at Ghirardelli Square, particularly on the weekends (less selection on weekdays). It’s part of the Koi Palace group.