I was looking at this one https://www.aliexpress.com/item/1005004077429476.html
It's very light and very cheap. I can just get a stem with a 25.4 clamp that's no problem. I've got a few other bars by tookrock / toseek and never had any problems with them.

I would also consider some all in one stem / handlebar solutions, I know they're heavier but they look cool and you don't see many people with them.

Wanted to see if you guys had any recommendations for carbon flat / riser bars, since there's a whole MTB section at the top of this forum. Maybe there's something that everyone agrees is good and light light the UNO stem?

That's probably the one component I wouldn't get off of Aliexpress.

Good handlebars from Spank, Ritchey, etc are like $40

Best value stem I've found is the 7075 3d forged Truvativ Descendant

I have these:
https://www.aliexpress.com/item/1005003244382487.html
and
https://www.aliexpress.com/item/1005003299009861.html

No complaints. Mind you I am light (65kg) and don't do extreme stuff with these...

I have used these for three years with no complaints: https://www.ebay.com/itm/266356554380?var=566176299620

Here's an all in one stem/bar: https://www.aliexpress.com/item/1005005611032673.html
Very stiff and light, but tend to get more expensive day by day 
From Firespider( in fact it is Toseek but with more exclusive models )