There are obviously tons of "solo" artists that play large venues, but most of them have backing bands or other supporting musicians. Often a whole lot of supporting musicians. Who are some artists that consistently perform shows in sizable venues completely alone with just sound they're creating for the audience (i.e. so excluding DJs that are mixing pre-recorded sounds)?

Artists I can think of include:

The Tallest Man on Earth - I've seen him several times and it's always just him on stage with his guitar. I've seen him play venues with capacity around 1,000 to 1,500 people.

Ben Folds - I think he's done several tours with just him on the piano, though he often tours with backing musicians as well. I've seen at venues around 2-4,000 capacity.

Neil Young - Another one that usually plays with a backing band, though I did see him do a purely solo performance once at a ~3,600 seat venue.

Who am I missing? Maybe some contemporary pianists like Keith Jarret or George Winston? Are there any artists who have played arena shows all by themselves?