Gondolin.

Earendil

Elwing

bird

Valar.

Mandos

Illuvatar.

Melkor.

Balrogs

PS. That's a bit pessimistic TGEW

Dragons.
P.S. I thought of Melkor, because he's the ruiner of music Eonwe.

Glaurung

PS. Obviously, but that's my point. There are also many other (nice) things associated with The Music, let alone music, in all of Tolkien's works.

Nienor

Niniel.

P.S. It's not my fault that I thought of Melkor first. That's how my brain works. I guess I could've thought of elves or something first, but I didn't.

Turin

PS. I'm not accusing you of anything, just commenting. I suppose I might have done the same.

Gurthang.

P.S. It's quite alright. I'm a strange person, I get it. It's your go.

sword

Alas me,I greeted a program!:D

Aranruth

Thingol

Elmo.

...Morgoth...

From Elmo?OK

Grond

Finwe

Fëanor

PS. Erendis, it was probably due to a forum member of the same name... :)

Silmarils.

Telperion.

Nimloth

Elendil

tall

House of Hador.

Tuor.

Ulmo

Voronwe