@gruber RC1 I really like, but you have to be able to deal with the slightly odd shift row layout. R3 is good for a more standard TKL or 100% layout.
https://mechanicalkeyboards.com/collections/realforce

Some folks really dig the HHKB ones but I refuse to use a keyboard without arrow keys. Though they do look really nice.
https://hhkeyboard.us/hhkb/pro-hybrid-type-s

Leopold FC660c is a personal favorite but is no longer made.

Start with a 45g + silent switch (which should be the most common these days) and then you can branch out.

@paul Yeah, same for me with HHKB — I just can’t without arrow keys.

Realforce: man, that logo…

@gruber Right. The R2/R3S have less obtrusive logos.

R2 is discontinued and isn't programable. R3S has laser printed keycaps. Both have really long built in USB-A cables.

You can, as I did with the one at the top of the picture, swap the R3S caps with the R2 caps and then do some minor surgery to add a USB-C port.