Compared to him I feel like Kid and Law honestly didn't do anything noticeable on the rooftop battle comparable to Zoro.
The only one who was superior to Zoro on the roof was his Captain Monkey D Luffy
How could Kid and Law who are captains have been below in terms of achievements compared to Zoro.
Does Oda want to send a message that Luffy's crew is special ?
Easy, that was the intention of the author.
Zoro is part of the main cast and his fight later was set to be King, a yonko commander.
So while he could, he drew him "more" impressive than those two since those two fight later was another Yonko, a much more impressive opponent.
Anyway, he only "outshined" them with Ashura (because of the unlocked CoC, or whatever it was that), with many """"""", since he couldn't even put him down with that attack.