In no particular order:
- Chandler vs Sins: Really liked how the Sins used their abilities and complemented the strength and weaknesses of each other to face Chandler. Speaking of him, his arsenal was pretty interesting to see (you could argue that his arsenal was better than the DK's, even though it makes no sense, lol). The battle was fairly close (for the first part before he got serious) also and had a decent amount of tension.
- Meliodas vs Escanor: Tbh, this fight has nothing spectacular. The choreography is not stellar by any means, the fight in itself could barely be called a fight since most of it was Mel stomping Escanor and then Escanor stomping Mel in the end. It's just the sheer hype it produced to me by reading it for the first time, seeing Mel trash Escanor just before his peak and seeing Noon Escanor for the first time and his power brought a pretty good excitement to me as a reader that even now I can still remember as if it was yesterday.
- Hendrickson vs Liones Kingdom: The impact of this fight decreased considerably the moment you learn that pretty much all the Sins were holding back and some were nerfed to some extent, but at the same time it was pretty good to see everyone facing that monster and being overwhelmed. It brought a pretty good sense of tension and desesperation (something that the current manga cannot do since a lot of time, sadly).
- Meliodas vs Ten Commandments (including the Gloxinia and Drole fight): We saw a lot of brand new different abilities being introduced like Combo Star, Mel being destroyed in a fight (even though he was holding back as always, but whatever, it was still good to see at the moment, lol) and the scale of destruction (something that the current manga has also lost) was really huge. Each character used his own abilities more or less accordingly and in a way that made some sense (unlike now, also).
- Meliodas and Arthur vs Gilthunder, Hendrickson and Vivian / Mel vs Ban (Vaizel Festival): All of them pretty good in my eyes. The choreography these fights had shits on anything this manga has shown since the last 60-70 chapters at least, and even though there's a certain chibi that was also holding back as always, I really enjoyed those.
Some honorable mentions would be: AA vs 10C, King vs Helbram, Escanor vs Estarossa, Mael/Estarossa vs Sins, Derieri and AA (even though I really disliked the end with King stomping him with no effort, I enjoyed the rest of the fight, the strategy to bring him down by Derieri, Mael's whole backstory and him getting stronger and losing his sanity the more commandments he absorbed, the number of deaths, etc). I may be forgetting some, but these are the first ones that come to mind.