Little Feat are a great pick. Though I’m unsure of their cultural impact. I barely know anybody who has heard of them. I never hear them played or talked about outside of the jam band scene. Maybe it’s a regional thing?
King Crimson are obvious if they want a prog pick, ridiculous that Yes, Rush, and Genesis all got in before them. But those bands had hit singles and that seems to be extremely important to the Hall for some stupid reason.