User blog comment:AYET/Asking for more of unseen fights or battles!/@comment-3119203-20120301042218

All of the ones you listed (even though Shanks vs. Whitebeard wasn't really a fight, just a show of strength) and then these:

Magellan vs. Blackbeard Pirates

Roger vs. Whitebeard (mentioned, never detailed)

Shanks vs. Blackbeard (scar?)

Crocodile vs. Whitebeard

Shanks vs. Kaido (not sure what happened here.....)

Garp vs. Roger (cornered=fought in my book)

Ace vs. Jinbe

Kaido vs. Moriah

Magellan vs. Shiliew

Well, if I think of any later, then I'll add them too.