Well, I have to say that Harmonoid is the best one I’ve found, it has a ton of cool features, it works and it allows you to be able to see your collection by album and it doesn’t use Electron. Right now its development has stalled a bit but it’s still pretty much in good shape, though.
Have you tried Strawberry? It’s the best one out there, imo.
I want to like Strawberry as a way to connect to Subsonic server on Linux, but it’s just so clunky. I hate list view, as well as the theme…
Have you tried Sublime Music (GTK)? I used other (Electron) alternatives but Electron sucks, Sublime Music feels pretty fast.
Which theme? If you configure it right it should match the system theme. Here’s what mine looks like on Plasma 5, Breeze Dark.
Need to make the switch, still using clementine, I like the Visualizations Clementine has that are missing in Strawberry.