Sutter Health Primary Care
Look into Sutter on Milvia in Berkeley. I've never experienced any wait time (over maybe 3 minutes) on the phone for scheduling, and when I've needed urgent nurse or on-call doctor support they do a call back thing generally within 30 minutes. They have great email support for non-urgent things too. I use them for my own OB/GYN & primary care as well as my kids pediatric care.
I've been thinking about that too, as my daughter is getting close to aging out of pediatrics; I had an appointment for myself last week with Dr. Samara Nebenzahl at Sutter on Milvia and thought she would be really good. http://www.sutterhealth.org/dr-samara-nebenzahl.html