If you are looking for additional things to add, those with tinnitus are likely to have suggestions.
I had a scare with tinnitus several weeks ago, where it suddenly became very apparent for a few days before subsiding to a point where I don’t notice it unless I specifically listen for it. This had me desperately searching for noise generators so I could get to sleep.
“Grey” and “pink” noise, and some kinds of cricket noise seemed to be most suitable for masking my type (which is very similar to the high pitch sound an old analog tv makes when it’s on). Heavy rain is also good, but it’s hard to find something that is suitable because most have some additional water splashing and gurgling, which triggers my misophonia.