3. The Batman
You talk about relentless; look no further than Robert Pattinson's vengeance-driven Dark Knight in The Batman. This is a young Batman just about two years into his tenure as a crime-fighter and he's all about the vengeance, so he's willing to do whatever it takes to stop the criminals in Gotham City. That includes walking straight into gunfure.
Yes, Bruce runs, walks, and flies into all kinds of danger in the 2022 movie, perhaps letting his emotions get the better of him on occasion. But that in itself highlights how unstoppable he is when he's on a mission, and when that mission is a three-hour murder mystery involving the chaotic Riddler, countless of his armed followers, and corrupt cops, he has to be unstoppable and more.
That being said, this approach has resulted in weaknesses, too, as his attempts to run headfirst into danger without a plan have resulted in extreme injuries. From his unsure flight off the roof of the GCPD building to getting overpowered by the Riddler's men before he could create enough separation, this Batman has come dangerously close to being stopped. And, as he realized when his vengeance-driven approach was inspiring the wrong kinds of people, making a change was necessary.
This Batman is on the right track to becoming one of the strongest of them all; he just needed to learn a few lessons in his first cinematic showdown. We can't wait to see how he has grown and evolved in the sequel.