Lies of P is the only game that really matched up to souls games, but Nioh came pretty close. The Nioh complete edition was free on Epic games a while ago, so check if you ever redeemed it. If you don't own it, it goes on sale for really cheap nowadays.
Nioh 2 is pretty good as well but it's very much more of the same. I didn't get that far in it to tell you which is better.
Avoid Mortal Shell, I thought it wasn't very good.
Salt and Sanctuary is actually really good despite looking kind of mediocre. Expect to get lost a lot, though.
I tried to get into Mortal Shell twice now and both times I've ran away screaming. I hear great things about it, but I find the character feel so cumbersome from the outset that I just give up after an hour or two.
It just plays different. Once you get a bit further than an hour or 4 in, it clicks. Frustrating at first as the difficulty has a technique ramp and some rather hard seeming enemies.
Hellpoint is also a lot of fun.
Lords of the fallen is good, though some of the bosses and ranged enemies are annoying. Need a powerful machine due to the optimization and bugs, daily patches for most of the week.
Darksiders 3 - apparently took a souls-like twist from the rest of the series; may be worthwhile if you can find it on sale (GOG currently has it for $10, ends tomorrow); I'm going to play through the first two before this
Some others that I've played that are kind of similar in some way in case you want to branch out:
Ys Origin - older game, but has a "hard Zelda" feel that reminds me of Dark Souls (almost no emphasis on leveling/skills, more on boss fights and gear progression like older Zelda games); if you like it, check out Cross Code or other Ys games (I've played 1&2, Celceta, and Felghana)
Furi - boss rush
Titan Souls - boss rush where you and the boss have 1HP
Blasphemous - Metroidvania that has a similar dark fantasy setting as Dark Souls
I want to enjoy those games so bad, but I always get so bogged down by the constant new equipment. I find myself spending 50% of the time comparing new equipment to what I already have.
Mortal Shell was pretty good and can be had for less than $5 pretty frequently. It's not as long as a lot of other Soulslikes but has some interesting mechanics.
I really intensely disliked mortal shell. I can tell it's a love letter to dark souls - all the styling is trying very hard - but the gameplay just pisses me off. Especially that first probably-optional boss that you have to parry like 30 times to beat.
I personally didn't like it. It's very easy to get lost, there are very few checkpoints, and the gameplay is just a bit too clunky. Maybe the latter two improve later on, but it lost my attention before that.
You've probably already played it, but I found Hollow Knight to really scratch the souls itch in combat, lore, and general tone. It also has some great metroidvania gameplay
There's a guy on YouTube, Ironpineapple, who has a ton of videos of him playing souls likes of a variety of qualities. You might find something there you like.
I've seen Elden Ring on PC for as low as £30 over the last few weeks if that takes your fancy. I'm also fairly sure it's on sale on PSN and Xbox ATM (at least in the UK).
Wo-Long maybe? It's from the folks that made Nioh and is on Gamepass.
Previous to the souls games were the king's field games of from soft, there's an indie that came out last year (so not much of a patient gamer thing, but it's criminally cheap) called "lunacid". I was skeptic at first but it got me hooked, really fun game.
I really liked the way they handled the health system where you first have to hit them with a regular attack to open up wounds and then remove their health by doing a claw attack.
If you’re still looking for more games to check out, watch Iron Pineapple on YouTube. He’s got a whole series dedicated to lesser known souls-likes. A lot of them are bad but there’s some good stuff in there too. He’s got great criticisms and generally tries to stay positive even with the bad games. Highly recommended