I don't think either of those really count as obscure...One of them is well-known enough to have been included in one of the Humble Indie Bundles, and the other is the source of one of the most overrated 8-bit compositions of all time.Before I get crucified, I'm not saying The Moon theme is bad, I just mean it's not as amazing as a lot of people give it credit for.
I've never actually played the game myself, but I like this one very much:Duck Tales (NES) Music - Title Theme
I can't post links right now... bleh.Tales of VesperiaMinecraft (from when it was obscure)Tales of GracesTales of The AbyssTales of Symphonia
The Tales series isnt obscure at all
I love how the majority of these aren't obscure
Pokemon Collesseum