According to Wikipedia, the main genres of music Gram Parsons played was country, country rock, and rock. However, his best work was usually in the "country" genre.
Genre of music: Pop
The Everly Brothers played music of the pop rock genre.
Glamrock
renesaunts
Play loud music. Emo is a genre of music.
Swing
Rock
House
Novastar is a band based in Belgium and they are known for the Indie pop genre of music. They play other genre's including Brit pop, pop rock, rock and alternative rock.
Punk and garage rock
The Los Rodriguez band, which was originally formed in the country of Spain, plays a very specific genre of music. The genre of music that Los Rodriguez plays is called pop-rock.
The music group Antony and the Johnsons play music that is part of the genre known as chamber pop. Their debut album is called Antony and the Johnsons and was released in 1998.