Any Creature that Zoro uses to Name his Attacks automatically means He will Surpass them,
Because his Attacks are meant to Symbolize him both Copying & Hunting those Creatures,
For example, when He used Tora Gari against Nyaban Brothers, He was both Copying & Hunting a Tiger (As those Two were like Big Cats),
It's like "I'm gonna beat Tigers by being a Superior Tiger",
When He used both Dragon Blaze & Dragon Twister against Kaidou were also another Example, or Madara Gari against Lucci ... etc
This is why Most his Techniques are Named after Animals or Mythical Creatures,
Zoro in East Blue was like their John Wick, They didn't call them Demon/Baba Yaga because that's what They resembled, but it was because They are the ones you send to Hunt such Beings, hence why Zoro's Signature Attack turned out to be "Oni Giri",
Imu's Design already falls within Zoro's Technique called "Charming Demon Oni Giri",
He also has "Daibutsu Giri", so it's obvious that this guy won't be satisfied & feel He reached the Level of Strongest He desires unless there is No One in Existence that He cannot Defeat with his Techniques,
He is a Swordsman obsessed with Perfecting his Attacks, and this was further proven in Onigashima when He wanted to Fight Kaidou,
I won't be surprised if after He beats Mihawk, He will even attempt to Cut "Death" itself,
The only Character who i might put above EOS Zoro is Luffy in a Situational Temporary EOS Form (Basically Endgame Version of Nightmare Luffy), but aside from that, Zoro is Peak Combat, Period.