BmoreGorilla
Veteran
Redman, Prodigy, and Too Short easy. These dudes are legends
this is the only song he ever switched his flow on that I can remember.
styles is another candidate.

By one-dimensional I mean they very rarely deviate from one mundane topic that doesn't have a lot of depth or nuance, but they're just great at it.
Some names that come to mind...
Prodigy-Murder and robbery
Sean Price-Shooting, stabbing, beating people up.
Pusha T/Malice-Coke and balling
Rick Ross-Coke and balling
Redman-How high he gets, how much weed he smokes, and that crazy space shyt that don't even make no sense
Curren$y-Weed, women, and cars
Drake-Being a bytch ass nikka
And I love Spitta, but it is what it is. But out of everyone you listed, I gotta go with Prodigy.
His one dimension is Jay.Jay is the master of one dimensionalism..