Mixer suggestions for 7U case

I have an Intellijel 7U case based with Metropolis, Atlantis, Jellysquasher. Am thinking of adding the Rainmaker. What mixer would work well with these modules and provide a link to audio sources outside the 7U case; such as sending drum machine sounds (Elektron RYTM, OT) to the modules and other stand alone synths (303, A4), whilst also controlling the Atlantis and outputs from Jellysquasher and Rainmaker?

Smallest HP as possible please, only 14HP available.