Yes, I know that "trailer music" is not "technically" a genre but still...
I recently got into this type of music and I am hooked on it. It is literally some of the grandest music I have ever heard.
My favorite artist is probably Immediate Music. But Two Steps From Hell and X-Ray Dog are close behind.
The only thing I hate about this type of music is that with few exceptions, it is not purchasable.
Here is a sample of trailer music -
Arcana by Immediate Music.