Since it is the only recent version, the ones mentioned in the start of the thread haven't seen an update for years, I've tried wGame.
I like the option to toggle between light and dark, but it does not fit our forum. We don't run plain SMF, but still a part of TinyPortal (the bars on the sides). When the theme is enabled the sidebars keep their current headers.
Another change I made to the current theme became clear when this theme was enabled. I removed the huge amount of space on the top of the forum page and made the menu more compact.
To show for yourself, I'll keep the selection enabled for a while