Soul King Ichigo

(Notes at the bottom)

Ichigo Kurosaki somehow managed to gain the powers of the Soul King after defeating yhwach giving near omnipotent power the only downside to it was he couldn't leave the dimension known as the Royal Palace which after some time there made him extremely bored the bright side was that thanks to his close Association with the soul Society they made it so people could come to the palace to see him. One of the things he was face to deal with being the soul King was dealing with the after effects of the war one of which is the drastic decline of Soul Reapers this was partially alleviated thanks to of all people Mayuri kuro who managed to figure out a way to bring people back from the dead though for some odd reason that even he couldn't figure out he can only bring back women so the female Quincys came back, a few Soul Reapers were brought back such as unohana and the female Royal Guards as well as a few arrancar. One of the things Ichigo did was create a number of islands in the Royal Palace for various reasons, one specifically for the Quincy's

( notes okay so this is more or less a plausible alternate ending to bleach aside from the blatant sex that's about to follow that Ichigo would most likely never be a part of. yhwach was able to gain the soul King's Powers by killing him there's probably more to it than that but that's more or less what I understand so Ichigo getting the Soul Kings powers after killing Yhwach is fully possible. second regarding the bringing back of the Dead Mayuri actually did manage to bring people back from the dead in this scenario merely just brings back all the females for you know what reason feel free to leave as many male characters dead as you want. Note I didn't list all the female characters that were brought back simply because you can kill off some of them only to bring them back if you want but I honestly can't remember who all survived and who all didn't. )