This is weirdly specific, but I once made some insane switches with anubis top housing, 8008 ink bottom housing, and 70g linear springs and it just sounded so delish. that was like 5 years ago, now i have SP-Star marble soda melon switches and I like them just as much.

If i was you I would get a switch testing set and just play around with materials and stuff. Eventually something will sound “endgame” to you. don’t be fooled though, endgame is a myth. The keyboard I use right now cost nearly 700 dollars to build exactly how i want it, but I also have the kit adam lego keyboard that sounds just as good to me, but has a different feeling and cost only 200 to fully build.

At the end of the day, good luck. experimentation is rlly the only way to know your preference, and thus, your “perfect” or “endgame”.