How about the Velocity A23? It was considered a "wide" rim for 700C wheels, but is still on the narrow/light side for 26":
https://www.velocityusa.com/product/rims/a23-559
There's also the Dyad, if you want a wider brake track and are not as concerned about weight:
https://www.velocityusa.com/product/rims/dyad-26
Welcome to BF, by the way.