One of the best brass players I've seen using circular breathing is Sergei Nakariakov on trumpet (flugel — or soprano tuba). Sergei happens to be among my favorite classical trumpet players.
Miraphone 5050 - Warburton BJ/RF mpc YEP-641S(recently sold), DE mpc (102 rim; I-cup; I-9 shank) Symphonic Band of the Palm Beaches: "Always play with a good tone, never louder than lovely, never softer than supported." - author unknown.
I was convinced i was listening to a tuba soloist a while ago doing circular breathing.
After the performance I had a chance to speak to him and tell him how much i enjoyed his efforts. When i asked him if he did circular breathing, he said " Heck no, i just cant do it" Now i wonder if my grandfather was right when he told me
"You can't suck and whistle at the same time" haha
Armin (who is sneaking, gulping, gasping but having fun)
Clark Terry is also a master of the technique. I have used it most of my career and find it a valuable tool on long sustained passages but can't do it for beans on moving notes. There is a lot of material on the subject on this site - I suggest you do a thorough search using that eyeglass thingy on the toolbar.
Gnagey CC, VMI Neptune 4098 CC, Mirafone 184-5U CC and 56 Bb, Besson 983 EEb and euphonium, King marching baritone, Alexander 163 BBb, Conn 71H/112H bass trombone, Olds Recording tenor trombone.