Probably not quite what you're meaning, …but, 'brown noise' ( https://youtu.be/FcWgjCDPiP4 ). I have a one minute clip I listen to hundreds of times a night it screens out anything else, and doesn't have anything for your ear to follow. It's amazing! I used to have two sources and a fan, but my CD player gave out.
If you're looking for something more conventional/melodic:
My favorite band this century, is 'Explosions in The Sky' ( https://youtu.be/cdiY6kijYHE ) sometimes they 'rock', but they do 'romantic era composer'-mode pretty well.
Eluvium has some good stuff ( https://youtu.be/xuZnS2cNJhc ) .
Some 'Dirty [...]