Tbf this probably the worst time to bring this up because just very recently a couple chapters ago Oda gave us a top 5 One Piece fight chapter all time.
It's about as much as you're gonna get from One Piece, solid art, proper back and forth with solid paneling and transitions, and actual IQ being involved as well with Imu going through his movelist with a proper flow.
We got a mix of haki, omen nukes, lethality with the conjured blade, and appropriate physical clashes where Imu physically amped himself to be able to match Loki. Not to mention the sheer scale of it all was a spectacle worthy of a god tier lvl fight, with how powerful Loki's blows look, the ones being blocked looked like island busters, the one that landed sending Imu across the entire island, followed up with a lightning nuke.
I can't think of 5 One Piece chapters clearly better than that from a combat perspective. It has scale, speed, strength, IQ.
Imu is surprisingly one of the most thoughtful fighters we ever had, everything is optimized. On the fly he is able to come up with the best way to approach each situation. Very very rare for One Piece.