Yingxiong Zai Lin

MC is the most powerfull character in the show There is Hero Asociation which concentrates all heroes around Huge destruction of surounding during fights 

if you like one of these anime you probably the type of person who likes power-leveling action. both of these animes are extremly similar, yet unique. both animes contain OP heroes; while the OPM MC focuses on more hand-to-hand combat, yingxiong's MC uses well-designed OP weapons (with the help of his own strength and dexteritory). throught both animes the MC gradually meets powerfull oppenents, from street thugs to literall Gods. the concept of "heroes" are similarly present in both animes with mentionings of "hero associations" and "hero rankings". it's also good to note that both MC's don't seem to be that intrested in the "hero" thing and both joined for different reasons. while i do think the fights in OPM are better in animation and action, the fight scenes in yingxiong are nothing to scoff at either. the fight scenes in both animes get to the point of destroying buildings and such. my favourite part about these types of animes is when the MC's get severly underrated by their oppenent - due to the MC's weak-looking appearance in both these animes this is quite common and it's intresting to see how the oppenent reacts while they're face-down on the canvas. read more 

Both have a Hero association that bases rank on power. Both MCs are overpowered but end up at the bottom of the rank due to written test. Hero Return is definitely more rushed without a whole lot of explanation or backstory to any of the characters.