FASA Star Trek (1983) was the first licened Trek game, and one of the first licensed games
WEG Star Wars (1987) literally took over the canonical setting from 1987 to 1996...
The authors of the Robotech novels were told to use Palladium's Robotech RPG as the sourcebooks for the novels.
All of those were common gateway games.
WoD was good, but not the only cultural impact games. It's probably the biggest change to gaming culture, and it reached well beyond gamerdom.
Every group I got to listen to, however, treated VTM as a supers game.
I've played Chill, run Buffy, GURPS Horror 1e, Alien (Free League), Aliens (LEG), Traveller using certain horror adventures, Tales from the Loop, Vaesen. A single session of Bureau 13.
Of those, Alien (FL), Vaesen, and TFTL are the ones I recommend. If a GURPS player wants horror, GURPS Horror is worthy.
Note on TFTL: It's not billed as a horror, but some of the adventures in the core and first module book have very strong body horror themes for the PCs, who are kids 10-15 YO, to find the source of.