Just going to start with a console.
Turbografx16
I hold this system as high as Genesis and Super Nintendo of the 16 bit era. If it was the 3 tenners TG would be the other guy. Not as well known often forgotten but had a lot to offer. Ys,Nuetopia,CV X,the first system with a CD add on and was not used for FMV games but to have arcade ports and using it's existing power of the console to enrich the games with CD sound.
It has many overlooked gems. So many I am just now discovering a fraction of them. You could say it was the Dreamcast of the 16 bit era