Recommendations for CS Grad Courses and Professors?

Are there any CS grad courses or professors you guys would recommend (slight emphasis on professors)? I'm currently considering Dependable Computing with Mok and Robot Learning with Zhu or Autonomous Robots with Biswas (if I can get off the waitlist). Any reviews on these courses/professors would be appreciated as well!

Also, in general, how easy is it to get off the waitlist for grad courses? Thanks!