Zoro has been consistently portrayed to be way above G2/G3 Luffy
Did better vs Monet and Hyouzou. Did better vs the Punk Hazard Dragon (don't remember if Luffy used Gears though).
1080 pound ho and Sanzen Sekai did light years better than Luffy's Elephant Gun vs Pica
Pushed Fujitora back several meters with an air slash prompting Fujinuts to call it brutal.
Oda literally used Luffy as a hype tool for Zoro with Hyouzou and Monet.
Sanji has nothing on that. Sanji did terrible vs Vergo and Doffy
If there is then it will be the last one. I'm betting on Luffy just mastering G4 and Awakening though, I think it'd be better for the story unless G5 is like this: