If i adore Soulsborne games, which one should i choose

I don't think any of those will hit home, albeit they are wonderful games on their own. However, even though I am unsure if it's even on PS4, I'd suggest The Surge. I recently started playing it and it is very promising so far.

The question you're asking is effectively, "If I love fruit, which should I choose? Pizza, salad, or potatoes?"

None of the games are Soulsborne-esque in the way that Nioh is. The closest in terms of challenging bosses and combat would be Monster Hunter World - it has similar slower paced combat where you need to watch a tough boss, learn their attacks before you attack, and commit to an attack when you do.

I'd suggest NIOH. Amazing game.