great thread, hard answer. Let's go one by one.
NOTE that when I say "classic" I mean personally to me, as in albums I consistently go back to and play you guys don't have to agree
Drake - Comeback season was ok, he was spittin but it didn't really grab me. So Far Gone is a classic mixtape, Thank Me Later is a pretty good album, Take Care was on some other shyt, but in a good way. His new shyt makes me think NWTS will be his best
"classics": take care, so far gone
"good": thank me later
"just okay": comeback season
Kendrick - GKMC is my favorite album of all the rappers in this discussion. Section 80 is almost just as good, and while I didn't like everything on O.D., it was a good start. Seems to have the least amount of music among everyone, but it's all good.
"classics": gkmc, section 80
"good": o.d.
J. Cole - I listened to the Warm Up and FNL all the time when they dropped. FNL is one of my favorite mixtapes ever. Dude didn't deliver on Cole World though... i'm amazed at how little I've revisited that album. But Born sinner is a definte winner... I've been playing that nonstop out of all of the new ones... to early to tell but to be optimistic i'll group it as a classic.
"classic": born sinner, fnl
"good": warm up
"just okay": cole world
Wale - interesting case

. Mixtape about Nothing was good, More about Nothing was even better, and to me those are wale's best works. 11-1-11 didn't do much at all for me though. Folarin was ok. As for albums, Attention Deficit is a little underrated (some filler, but some excellent joints). Ambition is a little overrated by some (Starts off flames, but tapers off near the end for me), and I haven't heard the Gifted yet, but I have high hopes.
"classic": more about nothing, Mixtape about nothing
"good": ambition, folarin
"just okay": attention deficit
"nahhh": 11-1-11
TBD: The Gifted
BIG K.R.I.T. - Maybe it's because I am originally from the south or something, but I think I listen to K.R.I.T. more than almost every else on the list

. He has the best mixtape discography of anyone to me. His album however was not that great, although I will argue that it was better than Cole World and Attention Deficit in my opinion.
"classic": Krit wuz here, return of 4eva, King Remembered in Time
"good": 4eva N A Day
"just ok": Live From The Underground
So looking at what I wrote, I think I might go with Kendikk as my fav just barely over K.r.i.t., with drake n cole close behing those two, and wale last, but that could change after I listen to "The Gifted"
But honestly they are all GREAT artists and I look forward to their future releases
