The Sta-Tru TR25 rim offers a 25mm tubeless ready inner profile with rim brake compatible sidewalls.  Offered with different hub options, these wheels might just be what you've been searching for.

The BWW V HD Max with Shimano Alivio Disc 26" mountain bike wheel set is both V-brake and 6-bolt disc compatible.

The Sta-Tru TR21 rim offers a 21mm tubeless ready inner profile with rim brake compatible sidewalls.  Offered with different hub options, these wheels might just be what you've been searching for.

The BWW XC HD 29er wheel set employs the use of a thoughtfully designed V-brake compatible rim, with quality sealed cartridge bearing hubs.

The Sun Rhyno Lite is a known rim. It has been known for decades.

The BWW V-HD with Shimano Alivio Disc mountain bike wheel set is both V-brake and 6-bolt disc compatible.