In my opinion, the best drummer (tecnhically talking) it´s Pick. The elegance of Pick was really nice.
In my personal preference, i think Terry Williams was the best drummer for the live situation. The force that Terry give to all songs, it´s awesome. And chris witten.. it´s a great drummer too, for sure, but i don´t like it. I think Chris Whitten ruined some songs, for example Sultans.. or the final solo on Money for Nothing.. i dont know if the concerts from 1992 sounds bad due a mix thing (on the BAsel recording, the drums sounds average, without power, but On the night, the drums sounds very very processed, and when the instruments sound very processed, they lost the beauty of the natural sound).
But it´s my humble opinion, in terms of groove and technique, Pick is the best. But for the live shows, for me, Terry was the best. I think that Alchemy, witout Terry, doesnt the same!
Greetings all from Argentina and sorry for my bad english
Enzo