Would you be ok with a good rival figure for 7.0+?(6.0 spoilers)

[Absimiliard]

Gameplay and story segregation are unfortunately a thing. Most of the enemies we face that appear to be a legitimate challenge actually aren't in lore, which is partly explained away as the WoL never fully exerting themselves outside of a few rare circumstances. The only mortals that have been able to stand up to the WoL's full might head on were Zenos and Ran'jit, the latter of which is universally agreed upon to come across as forced to a degree that is ridiculous. All other incidents were written in such a way as to provide adversaries with a numbers, tactical, or technological advantage. None the less, this does mean the WoL is not invincible.

[Cleretic]

The only mortals that have been able to stand up to the WoL's full might head on were Zenos and Ran'jit,

and Raubahn (if you count sparring), and Elidibus in Zenos' body, and Lyon, and Sartauvoir, and Elidibus in Ardbert's body, and Menenius, and Lyon again, and Venat...

There's actually been a good few people that 1v1'd us and walked away, it's just that not all of them went in for multiple rounds.

[Veloran]

and Raubahn (if you count sparring), and Elidibus in Zenos' body, and Lyon, and Sartauvoir, and Elidibus in Ardbert's body, and Menenius, and Lyon again, and Venat...

You just listed a bunch of people that WoL beat.

[Absimiliard]

and Raubahn (if you count sparring), and Elidibus in Zenos' body, and Lyon, and Sartauvoir, and Elidibus in Ardbert's body, and Menenius, and Lyon again, and Venat...

There's actually been a good few people that 1v1'd us and walked away, it's just that not all of them went in for multiple rounds.

Raubahn was pretty clearly outmatched the entire time, Elidibus had access to his full power even while wearing Zenos, Lyon, Sartauvoir, and Menenius all end up getting theirs, Elidibus was (as with Zenos before) still able to utilize his full power in Ardbert's body, and Venat was an Ancient.

Zenos and Ran'jit, however, were pure mortals that managed not only fight back but make it very clear they could have killed the WoL at various points up until they screwed around for so long they lost their advantage. The former allowed the WoL to grow stronger, while the latter simply lost the advantage of having an unfamiliar fighting style.