I identify heavily with portraying Ulmo, lord of Waters (Tolkien's Sea-god) because even though he's the 2nd most powerful Vala he's frequently overruled such that he's kind of the 'Dilbert' of the group. It was Ulmo who saw that he was going to have to intervene while the rest of the gang stayed in Valinor, setting up a more or less path-of-prophecy which led to Elrond's father being born. I mean it's more tricky than that Mandos foretold Earendil's birth by name but it ended up being expected of Ulmo to guide the process.
It sorts well with being a musician because Ulmo's star skill is being the 2nd most knowledgeable about the Music (fate) after Manwe who leads the entire troop of Valar.