Benet Maclean might be one of the best in the world. He ls based here in London and is a true musical genius. He plays jazz piano and is an extremely good classical violinist too.
I don’t know him very well (we violinists hardly ever get to meet) but really love his playing and have a lot of respect for him for his true artistic dedication!
Check this really cool example (perhaps the only example Iv ever seen that actually works) of using a loop pedal in jazz.