Those were the main ones I worked with, plus another commercial package, I forgot its name, which was decent.

The Calf compressor and bass enhancer were very good. I'm seeing that a lot of plugins have been added in the time since I last worked with Ardour. Makes me want to start making music again :)

Unfortunately, the CALF series have been notorious for having problems or causing crashes in the past. If you do want to try it out, I highly recommend getting the latest version or building from git as a lot of distributions package an older version in their repositories.