After everything we are seeing from Kakashi, you say he probably can't beat Mei or Tsunade, you have to be a haterHonestly I see kakashi as slightly stronger than or equal to mei or slightly weaker than/equal to tsunade.
This comparison is reason enough to put him at Kage level, because he is on the same level as Kate's even though they are somewat weaker ones in most peoples opinions, including mine. I base this idea off his intelligence when using his many techniques, he's got a very large arsenal and knows the best ways to apply it to any situation, that's a very deadly combo. I also base this on kamui but not for the reason most are saying. Most people talk about how much of a great offense it is but as we've seen it can be dodged and if it is dodged then that's a waste for kakashi because of its chakra consumption and damage to his own body, but its defensive ability is a different story. Kakashi can defend against virtually any attack (don't challenge this statement because I'm sure their are exceptions to this) so he could render an opponents attack useless thereby wasting their chakra and energy even, plus he would then see their attack with his sharingan and most likely be able to counter it easier next time.
Kakashi is kage level when comparing him to Kages like tsunade and mei for instance because he is clearly on their level.
I can see part 1 Kakashi beating Mei and tsunade judging from his past feats
Kakashi would stomp Mei and Tsunade, I can also see him beating A
Gaara and Oonki idk about