musical drummers...who are they ???

"Musical" drummer?Hands down...BOZZIO! He does in fact tune his drums to musical notes. The best of these example are his solo discs.Hard to find imports or buy directly from his site. Just him, and musically awesome. At times, he his playing multiple syncopations divided by left and right hand/feet, sounding like two seperate drummers. You must hear this!
"Chamber" is orchestral music composed by him and played with a full orchestra and some rock instruments. It is an aquired taste, but essential if you are a Bozzio fan. IMHO, he is a living legend in the drumming world.

Oh, and another Zappa alumni...Chad Wackerman. He writes his own stuff which is very fusion oriented. I am a little biased here since my son studied under Chad's father, Chuck Wackerman, while playing in the Los Alamitos HS Jazz band. A great teacher, who has 3 sons that are proffessional drummers. Youngest son Brooks Wackerman has done work with Danny Elfman and an extended stint with "Suicidal Tendancies" amoung others.