I highly recommend the workbench theme from Rookervik: https://retropie.org.uk/forum/topic/5552/release-amiga-workbench-emulationstation-theme
It's my daily driver! Clean and easy to read with a pixelated touch. My favorite thing about it is that lots of info is shown at the same time and stuff rarely gets cut from the side on a CRT.
Also, if you say you're using a CRT, I just wanted to link you a cool little script I use to set the overscan: https://github.com/ukscone/set_overscan
Super useful, play around with the disable_overscan and overscan_scale values to make sure the system does what you want.