As I said before your not giving Kakashi enough cr3dit so im gonna do it like this:
If Tsunade fought Deidara would she win I dont think so!
If jiraiya were face to face with Sasuke's susanoo would he be able to stop the arrow!?Not probable.
Would tsunade jiraiya or orochimaru be able to deal with Kakuzu double teaming them 2-1!?Tsunade definetly not, Jiraiya way to slow hes dead meat no time for him to go into sage mode, Orochimaru would last the longest due to his survivalist type of fighting style but he would still die.
kakashi didnt even fight deidara at his full, he was missing an arm already and he was low on molding clay after the battle with gaara.
jiriyah would go into awakening mode if he saw sasuke using his susano and it would be a very close match.
two of the sannin vs kakuzu would be a win aswell, kakuzu is strong but his weaknesses are his hearts and if jiriyah went into awakening mode and tsunade was punching those monsters that came out of akauzu its over for kakuzu.
orochimaru could defeat deidara by himself, he isnt too strong, and his attacks are well at long range, but as we saw orochimaru can fight both long and close ranges.
but again you still try to give kakashi credit that he doesnt deserve. im not trying to knock on your favorite character... im just simply stating that kakashi cant be put up against some of these people that you are claming he can beat. he first off doesnt have the chakra to continue fighting them and that would lead to his defeat and on top of that people like the legendary sannin are out of his league, and to make it even more clear anyone in sage mode is outta his league... that means naruto and jiriyah.