Pretty much all of those are characters from franchises that quickly jumped to consoles, or had the intention of multiplatform releases from the very start. I’m not sure any of them are very fitting.

So on that note, the least nonsensical mascot for PC gaming in particular I can think of is that dwarf, whoever he is, from the box art of World of Warcraft. Or possibly the orc from the alternate version. WoW is earth-shatteringly popular and has basically defined the entire private lives of a depressing number of people, not to mention it’s the sole and singular thing even non-gamers think of when you mention MMORPGs. And it has only appeared on home computers. Never consoles. Other Warcraft properties have, but not WoW.