Further Researching

Examples
These are just a few of the many thrillers that have been released in the past couple of years.
The Dark Knight
Smokin’ Aces
No Country for Old Men
Hitman
The Bourne Trilogy
Snakes on a Plane
Casino Royale
Assault on Precinct 13
Law Abiding Citizen
(Source - http://en.wikipedia.org/wiki/List_of_thriller_films:_2000s)

Typically, a thriller provides “excitement, suspense, a high level of anticipation, ultra-heightened expectation, uncertainty, anxiety, and nerve-wracking tension”.
Usually, the plot involves “characters which come into conflict with each other or with outside forces”. A lot of thrillers are hybrids, mixing 2 genres together. Examples of these are suspense-thrillers, action or adventure thrillers, sci-fi thrillers and more.
(Source - http://www.filmsite.org/thrillerfilms.html)

Some of the best thrillers ever created were by Alfred Hitchcock. He started in the 1920s and created films well into the 1960s. His films have set the bar for all thrillers and show how they should be done to maximize the enjoyment of the audience.