Dweezil would be great, he has amazing economy picking technique.
Derryl Gabel is another guy who plays some monstrous covers of Allan a Holdsworth, Frank Gambale, and some others.
I’d really enjoy Brett Garsed to see some of his hybrid picking and how he thinks about creating melodies over the fusion changes he plays over.
Jens Larsen would also be great: be can alternate pick anything!