TowerJazz runs 0.35 and 0.18, I think 0.13 at Newport Beach.
Some flows have HV devices, RF passives, etc. available too.
OnSemi has some nice flows down to 0.11 at Gresham and
a bunch of power management variants in the 0.18 & up
range. Both of these outfits run multiprojects internally and
I've been told that if you're creating useful IP for their "IP
stores" you can get some breaks on the cost of a ride.
You can check with MOSIS about scheduled runs as well
but there's more going on below the surface, at the foundries.
I don't know what your values are, to say which might be
"superior". Sometimes that boils down to "the one that would
return my phone calls".