I went gruvbox some years ago and now cannot live without it. I’m using a base16 variant of it.
I love and use gruvbox too! Do you have a pointer to the base16 version of it, or did you hand-tweak/make it yourself?
The one I use is from this repo: https://github.com/chriskempson/base16-vim, which is built on the "base16 system" https://github.com/chriskempson/base16.