Kakashi can get killed off by plenty of people. Itachi, Madara, Obito, Naruto, Sasuke, Raikage, Ohnoki, Killer B, Jiraiya, Orochimaru, Hashirama, Minato, Tobirama, Izuna, Third Hokage, Nagato/Pein. So long as a character is fast and forch him to continuously use Kamui to stop attacks instead of him being on the offense then he has no chance.
you are act stupid character
you don't know about izuna,or prime sarotobi you just fill your list
itachi,sasuke can't counter kamui and kakahsi can counter his attack
madar is stronger than kakashi but kakashi can kill him even if he inside perfect susano as kakashi need only to warp its head or the part where madara stay
onki can't counter kamui but kakashi can counter the dust
A :kakashi can warp him or his neck without he feel to use his speed(kakashi warped naruto withouut obito who has sharingan and ringan note it is as minato did (used ftg and went behind obito and hit him without obito note to use his intangible)
tobirama(with his power which appeared in the manga):kakahsi cn kill him without kamui
jiraya can't counter kamui kakashi beat him in not time
bee :kakashi can avoid his attack by going to the other dimension but bee can't counter kamui
you speak as kakashi's kamui is the slowest attack and any one can perform jutus before it
kakashi's kamui is fastest and farthest attack so if you talk about speak kakashi can beat anyone in the start of the fight
kakshi has good defense as go underground(counter for all jiray's jutsu),speed with gates,sharingan's note,go to the other dimension (counter for any attack)
kakashi can counter all this jutsu by going to the other dimension(the meteor,giant bijudoma,the flower of the world,c3(or go underground),the dust(or avoid it with gates's speed),c0,chibaku tensi(or warp it before it get bigger),hirudora,.........etc)