The Internet Archive quietly upgraded its in-browser technology to increase its portfolio from around 600 to over 1700 arcade games, emulated in real-time.
There are literally tons of lost classics to choose from; most work full speed on a modest PC thanks to their new technology.
Might I suggest:
DJ Boy
BRap Boys
Baseball Stars 2
Narc
Xmen
Super Pang
Dungeons and Dragons
Bomberman World
Captain America and the Avengers (not a great game, but relevant for today!)
Sunset Riders
Smash TV
among tons of others. Works in pretty much any browser, any machine (Chrome is probably the best.)
You can keep your Playboxes and SwitchPros. I have a blast from classic arcades. For free!
(but as a non-profit, feel free to give them a donation if you like.)
https://archive.org/details/internetarcade