Yes, Cynthia Parker's story is gripping and worthy of a film.
Also, an unknown or ignored story is that of Britt Johnson, a freed slave in Texas of the same time period, whose wife and 2 children were kidnapped by Comanches along with a white woman and her child.
All the white guys gave up but Britt kept after them, alone, pretended to be a trader and crept into the Comanche camp and brought them all home.
An incredible story of courage, love and perseverance. Never told. I bet you never heard of it.
Actually the name tickled a memory cell and sure enough, he is mentioned in Fehrenbach's Comanches.
Qanah Parker had the last laugh on everyone, though.