The Slick Themes have been pretty popular and used by a few image makers. Different background per variant and a main image window changing as you scroll the menu. Clean to look at and 30 different variants to choose from.
https://github.com/RetroHursty69/es-theme-Slick_Brush
https://github.com/RetroHursty69/es-theme-Slick_Bubble
https://github.com/RetroHursty69/es-theme-Slick_Castle
https://github.com/RetroHursty69/es-theme-Slick_CheckerPlate
https://github.com/RetroHursty69/es-theme-Slick_CityHeights
https://github.com/RetroHursty69/es-theme-Slick_CityLights
https://github.com/RetroHursty69/es-theme-Slick_Dazzle
https://github.com/RetroHursty69/es-theme-Slick_Edge
https://github.com/RetroHursty69/es-theme-Slick_Fire
https://github.com/RetroHursty69/es-theme-Slick_Funk
https://github.com/RetroHursty69/es-theme-Slick_Green
https://github.com/RetroHursty69/es-theme-Slick_Orange
https://github.com/RetroHursty69/es-theme-Slick_Pacman
https://github.com/RetroHursty69/es-theme-Slick_Pink
https://github.com/RetroHursty69/es-theme-Slick_Red
https://github.com/RetroHursty69/es-theme-Slick_Sick
https://github.com/RetroHursty69/es-theme-Slick_Smash
https://github.com/RetroHursty69/es-theme-Slick_Snazzy
https://github.com/RetroHursty69/es-theme-Slick_Spinny
https://github.com/RetroHursty69/es-theme-Slick_Steel
https://github.com/RetroHursty69/es-theme-Slick_Sunset
https://github.com/RetroHursty69/es-theme-Slick_Swingin