I also have a very short forehead and no bangs. Normally I wear my hair loose or with a few little pins to keep it out of my eyes. A costume piece adorning the head frames face and hair nicely and completes the theatrical image we like. I have a few tricks I use to make simple adornments. But first I'd like to mention that some types of costume pieces on the head can turn into liabilities.
Bulky pieces can feel hot and heavy while dancing.
Anything fastened to the hair with combs, barrettes and bobby pins can slip or fall out. Tied scarves can come loose. Long strings of beads on a headdress can whip around and smack you in the eye when you spin. Coin headdresses are difficult to keep in place while bending in any direction. So always practice with your headpiece to avoid awkward surprises during a performance.