Lmao Killer can't even touch Katakuri, let alone defeating him. Before making this assumption let's wait to see how he defeat Hawkins.
Law is heavily countered by FS and special paramecia.
Kidd could maybe beat him over high diff by portrayal but for now we didn't see one single move from him to overcome Kata's FS. He's a strenght-based character, not a fast one.
Zoro can probably defeat him by recent portrayal with his AP, endurance and reflexes but swordmen are strongly countered too by FS+special paramecia so it wouldn't be easy at all.
The only one we are sure he can handle Kata under high/mid diff is current Luffy with Gear+advCoC.
Some people here are really starting to understimate YC1