Glad to see that someone mentioned Dave Mattacks, of Fairport Convention fame, Dave did some impeccable drumming for them as they migrated from a pure folk to folk rock and helped establish the british folk rock style. His drumming on Sloth on their live album (my candidate for best live album ever) is astonishing in its breadth and fluidity. the other brit that was doing some fabulous things with odd timings but very steady rhythms was Clive Bunker of Jethro Tull. His drumming on the Stand Up, Benefit and Aqualung albums is absolutely spot on with some very tricky rhythms.
Obviously, the already mentioned Baker, Bonham, Moon trio but no one has mentioned Charlie Watts and the crucial role he played in the Stones, think of Satisfaction without that beat, Honky Tonk woman and many others. Not technically the best, which also includes Ringo, but always served his band beautifully.