I'll suggest a few that would be easier (notes closer) on a 6 string:
You could play "All right now" (by Free) and halve the distance of the slide in the solo.
"Good vibrations" by the beach boys perhaps. There's other songs played by Carol Kaye with high register notes.
Possibly a few Beatles tunes? "Come together" uses the high E i think.
Anthony Jackson invented the 6 string and played plenty of sessions.
These may or may not sound better on thicker strings.
