Kirk, Riker, Archer. Juvenile, cocky, arrogant jerks who have no business representing our culture out in space.
I do like Kirk more in the movies, he seemed to mature a bit.
Tuvok bothers me as well, a Vuclan who chooses
to live and work among humans, and then looks down his nose at everything about humans. Spock and T'Pol never showed that level of closed-mindedness and condescension (though T'Pol got close). He should have been assigned to the T'Kumbra.