It depends on what you want "best" to mean...best tasting?
best behaved? biggest eggs?
my 0.02 is that any of them can be mean...in my personal and limited experience I've had tibetans, tibetan tux, goldens, english whites, browns and jumbo browns, and newly- cinnamons. You mention mean tibetans- I've had mean ones and nice ones. I'm not really sure that temperament would have anything to do with color, but more with bloodline.
At the wonderfully succinct advice of wifezilla- I culled my mean ones. The result- a less stressed, more sweet and calm flock that lay better and more consistently.
Now- as far as "best"- I personally like raising the browns, goldens, and cinnamons because I can begin to feather sex at a much younger age than with tibetans, english whites, and tuxes- but I'm not good at vent sexing, and so it is easier for me to look at how they feather in.
So that's my 0.02....I'm sure others will be able to chime in with more experience, more knowledge, and more technical advice! Best of luck with your new quail adventures!
-K