I don't think any style beats any other style 100% (or almost 100%) of the time, but I like the following dynamic - fundamentally sound fighter with good wrestling beats flashy movement heavy striker. Examples -
Woodley>Wonderboy
RDA>Pettis
DC>Gus
Frankie>Yair
Esparza>Rose
Tate>Holm kind of (I mean, people say Holm is boring now but she was thought to be a flashy dynamic striker after beating Ronda lol)
Ground the flashy!
MT beats karate
Wrestling stifles BJJ
Also care to go in depth on why MT beats karate?
No style is superior to another. All styles and techniqes have a time.and a place. The best style is no style as Bruce Lee and even Conor mcgregor have stated.
Boxer Wrestler with some defensive BJJ might be best. You can keep it standing against BJJ guys and can take down strikers. Aldo was good at beating it, but that was because the wrestle boxers he faced were usually wrestlers first. A Boxer Wrestler with technical striking (McGregor/ Holloway level striking) might be unstoppable.