What relaxing/etheral music like Happy's Happy Place song from Happy Gilmore or Sky and Sea from Mario Sunshine do you know?

Porcelain - Moby

Erana's Peace - Heroes Quest (Quest for Glory)

Stickerbrush Symphony from Donkey Kong Country 2

Uncharted Worlds (galaxy map music) from the Mass Effect soundtrack

I don't know those two songs, but when I think relaxing and ethereal, I think Banco de Gaia.

Since you mentioned a video game track, I'll say Epona's Song from LoZ OoT