Aegis did a pretty good series on loadouts per class. If you haven't watched his videos, he's the guy that maintains the testing for the damage loadout spreadsheet.

Warlock: https://www.youtube.com/watch?v=I-IdXoh05fU Titan: https://www.youtube.com/watch?v=02WVEewQmHs Hunter: https://www.youtube.com/watch?v=XRv78LpLzYc Damage Strats: https://www.youtube.com/watch?v=mETvZf2vyRc

Loadout Spreadsheet: https://docs.google.com/spreadsheets/d/1_5wtBjRYHHxuF4oJKDb_iOGZs-wTkzB6RYbnyNLbuz4