If you want a mostly straightforward WordPress-alike that’s not WordPress, you probably should at least consider Ghost. I’m using it for my blog and it’s got a slightly weird focus on “paid blog members”, but it’s super solid and doesn’t have a multi-decade history of endless security problems.
And, soon, it’ll be a happy member of the Fediverse.
Just a side note, Commento is kinda dead on the self-hosting front at least as it’s been years since an update, which is probably not great for a public service.
However, Comentario is a updated fork that’s being maintained.