Brasov is gorgeous. And has a Hollywood-style sign.
Sighisoara is my fave city in Romania - I've not been, I just mean in terms of the pics I've seen.
Which reminds me - not Romania, not Bosnia - but one of the most fascinating cities I've become aware of (not Tbilisi):
Booking.com
One hint is just to elaborate on what you see - the old part of the city is on the top of a modestly-deep river canyon. Creates a cool vibe like Santorini, but more earthy.
And a potentially bigger hint... the city's name has two words, the first meaning Great/Big/Etc.