I can't see what you are seeing, but my guess is that the initial problem either began as a result of the trigger guard having been sprung, or possibly the housing itself getting pinched/distorted.
In other words, my experience say's that the hammer not moving freely was not the problem, it was the result of a problem.
And just in passing...I wouldn't continue forcing the hammer to release in hopes that it is going to magically fix itself, nor would I set about working on the trigger and/or sear notch as a means of fixing/masking whatever is actually wrong.
At this particular point, my suggestion would be to totally disassemble the trigger Ass'y so you can determine which part(s) is/are now out of whack and go from there. Or if you don't deem that to be practical, send the intact trigger Ass'y off to someone who knows exactly what they are doing AND has access to restricted factory parts...someone like ASI, or maybe Brimstone...or cut through the chase, call Ruger, and make arrangements to send them the gun.
Sorry that I'm not much help, but like I said...I can't see the problem from here.
DGW