I mainly stick to webtoons where the lead starts out ludicrously weak and then the power scaling goes absolutely bonkers. 'Solo Leveling' is the obvious answer, but honestly, after the hundredth dungeon break, it can feel a bit repetitive. I found 'The Beginning After the End' hits a sweeter spot for me—the action is crisp, the magic system has some logic to it, and while the MC is OP, his emotional baggage from his past life gives the fights more weight. It's less about whether he'll win and more about what it costs him to keep that power.
For pure, unadulterated action spectacle, 'Omniscient Reader’s Viewpoint' is a wild ride. The protagonist isn't physically overpowered in the traditional sense; his power is knowing the story itself, which leads to these incredibly tense, cerebral battles. The action sequences feel like watching a master strategist play 4D chess while everyone else is throwing punches. The art in the later arcs is just stunning.
I'd also toss 'Legend of the Northern Blade' into the ring. The mood is darker, more revenge-driven, and the martial arts choreography is drawn with this beautiful, flowing linework that makes every movement feel lethal. The MC's power growth feels earned through brutal training, not just a random system gift. Sometimes you just want to see a cold, determined guy methodically dismantle his enemies with a style that looks as good as it hurts.