I'm sure there are some classical lovers out there. I'm pretty new to the genre but I love Claude Debussy's Clair De Lune. First time I heard it was the ending of Ocean's 11.

Any suggestions of other composers with similar style, cause I really love this song. Helps me do HW.

Debussy is Debussy and therefore no composers are like this, though you can try Ravel or look for impressionist period composers

Pretty much this.
Agree it's a awesome piece, check out Erik Satie else... Debussy still represents well-made filmscore, look up for Joe Hisaishi or Ludovico Einaudi.