Action (this is one of the most common Thrillers, the main type, including films such as The Shining)
Western Thrillers, (such as high noon)
Sci-fi Thrillers (these are also films that I have seen many of, such as Alien)
Crime Thrillers ( such as The French Connection)
& Film Noir Thrillers ( such as double indemnity)
There are even a few Rom-Com Thrillers which I am interested in.