That person is not 'toxic' because the qualifier is that they have trained their coworkers on the frameworks they created, thus they actually get along.
I think the toxic version would be making statements like, "I spend all my time building frameworks that if my coworkers used them, would double their productivity, but they're obviously too stupid to understand. The more I hear their silly questions on how to use it, the more I realize how f'd hiring is around here that these people are 'coworkers'. So please, I give up, I'll use my frameworks and I'll be 8x more productive than them, just make them leave me alone so I can work."
What if we fire Mr Snobby Pants and hire someone who's both socially and technically competent?
My unbelievable straw man is looking great in your yard. Along with the many things I "seem" to say versus the things I actually say.
blue1379 brings up some very valid questions. If a snobbish, but highly talented employee builds toolkits/engines that double or triple the production of the average employee, does the same equation used in the study apply?
On the other hand, what constitutes a "non-toxic" employee? Does everybody's buddy who convinces half the team that 2-5pm is ping pong and beer time not disproportionately decrease productivity?
He's asking for more nuance, which is never a bad thing. You seem to be demanding that things stay binary.