Alright... so, I'm revisiting
Zhoniin's 2019 S-class tier list and it's clear how much the scaling has changed since then. Some of you will point out the weak points in Zhoniin's reasoning, but to be fair most of the differences between his tier list and mine can be explained by new developments, redraws and the new divergences between the webcomic and manga. Not entirely sure on the exact placements of some heroes, so heroes in the same tier should be comparable/exchangeable unless stated otherwise
Zhoniin's old tier list.
Tier 0 - Able to defeat all dragons, low, mid and high
1. King: Easily God level. He literally can't lose.
2. Blast: Reserved to fight God level threats. Could defeat all of the s-class at once, probably.
3. Tatsumaki: Reversed Boros's barrage no problem. Very fast, very durable. Could beat EC, negative diffed Gyoro Gyoro.
4. Metal Knight: Power even the HA fears, has Boros's ship wreckage. Likely to have crazy stuff, presumably stronger than Brave Giant.
Tier 1 - Able to defeat low and mid dragons
5. Bang: Low-diffed Melzalgald, chumped hero hunter garou, decent performance against Elder Centipede.
6. Darkshine: Defeated Carnage Kabuto, effortlessly pulverized transformed bug god. Zhoniin said he should be comparable to Silver Fang all things considered.
7. Flashy Flash: Killed two decent dragon level threats in a single strike. Fast enough to blitz almost any dragon.
8. Drive Knight: Showed himself to be faster, stronger, more durable, more versatile and more intelligent than a cadre like Nyan.
Tier 2 - Able to defeat low dragons/actually competitive with mid dragons
9. Child Emperor: Can defeat many dragons with Brave Giant. Still effective with just his backpack and a moment to think.
10. Atomic Samurai: Relatively lackluster performances against dragons but suffers due to bad matchups. Could probably defeat a dragon with better matchups.
11. Amai Mask: competitive with dragons, butchered the mercenary squad. An all-rounder with no easily exploitable weaknesses.
12. Watchdog Man: No diffed Hero Hunter Garou, probably fought a dragon by now defending Q city.
Tier 3 - Somewhat competitive with low dragons/ambiguously dragon level
13. Zombieman: Hard to kill. Can survive dragons. Could potentially outlast dragons.
14. Genos (unclear): Good performance against EC in a previous build, should be stronger in his new draedic build. Probably an unbalanced build given Kuseno's comments.
15. Metal Bat (arguably higher): Stopped EC's charge, would have killed Hero Hunter Garou if not interrupted. Supposedly can defeat dragons.
Tier 4 - Able to defeat most/all demons, not demonstrably dragon level
16. Pig God (arguably higher): lack of feats, interesting abilities but not demonstrably dragon.
17. Puri Puri Prisoner: Able to one-shot a demon in impressive fashion, versatile abilities like vibration attack, defense buffs and regen.
18. Tanktop Master: Physically powerful, but suffering from a lack of screen time. Lost to hero hunter garou, so not stronger than high demon.