Prodesign (Denmark) and Modo (US+Japan) have stylish good-quality frames that retail for half the price of premium brands like mykita, ic berlin, lindberg. Unclear why they don't have many competitors.
Mykita founder split from ic berlin (screwless frames). If you look at their designs, there does seem to be IP/patent avoidance. Both are comparably priced. There are supposedly cheap clones available, maybe they can be found on Alibaba.
I love Prodesign, but yeah they're not exactly competing on price.
Also a big fan of Etnia Barcelona -- they're in a similar price bracket (as far as I know they're independent, but I'll admit to not having researched it)
Mykita founder split from ic berlin (screwless frames). If you look at their designs, there does seem to be IP/patent avoidance. Both are comparably priced. There are supposedly cheap clones available, maybe they can be found on Alibaba.
Edit: see https://news.ycombinator.com/item?id=15431180
Edit2: ic berlin patent (expired?): https://www.google.com/patents/US5418581