Phuuh, that a big question to answer, one I don't trust myself to get fully correct.
As far as rim profiles go, I am inferring based on all the data and simulations I've seen but those come from different, but similar profiles. I do plan on doing some cfd on the chinese options in the near future when I'll be building a set for myself.
For full builds:
Light Bicycle probably #1 for customer service and reliability.
CRW for pure performance, not the absolute lightest anymore, but still the best hub and spoke setup. The profiles aren't perfect but the 50/60 should be stable, is tested to be quite fast and the rear rim profile doesn't matter that much so you can put wider tyres on it. Not that great for heavy riders.
Farsports for ease of use, no holes in rim bed, external nipples come at a slight aero penalty, very light. Reliability should be good, but they're not as developed as a company as LB.
XMCarbonspeed are a new, upcoming player. Their offerings aren't quite as mature as others just yet, but they offer a lot of customisation, very light and wide rim options. Very cheap as well. If looking for carbons spokes, would wait for their new hub to become available in the early months next year. Am considering them for a rear wheel myself.
Very informative thread on chinertown
If you're interested in steel spokes, Yeoleo's new wheels have pretty sensible rim profiles and are pretty ok priced if you use some discounts floating out there. I don't fully agree with their hub choices, they're good but there's better from the manufacturer of those hubs.
Rim only:
CarbonBikeKits make some very light rims. Would be my current choice for a very light front rim
50mm 360g. If you want the best stability and wide tyres, they make
some that imitate the roval clx II front, but even wider. The carbon spokes they use aren't on the level of others. No idea about their realiability or customer service
Ornan also make some light and nicely profiled rims, but their choice of carbon spoke boils down to: do you want slow spokes or heavy hubs? They have a notice on their website that future products will no longer be displayed on their official page and to contact them for info. IDK what that's about, maybe there's more available there. Their 58mm deep, 23mm internal rim would be my current choice for aero at the front. Their 70mm deep, 22, internal rim is one of my considerations for the rear. Again no idea about customer service or reliability.
This isn't fully exhaustive and there are still details I've left out, especially some third party hub choices.
