Stallions Ty and Copper.
Ty was keeping Copper away from the band.
I think I’ve finally sort of figured out now that this actually is two bands – Ty’s and Corazon’s – and they are just even closer than Hollywood’s and Comanche’s, with Copper as the satellite stallion. Coincidentally, Ty and Copper are the non-pintos in the “pinto band.”
As an aside, does that profile on Copper remind anyone of Cinch?? Very distinctive; Cinch’s was even more pronounced.
Spring Creek Basin Mustangs 
Is there speculation that Cinch could be Copper’s sire?
Not by me. Too similar in ages, I think. But clearly their genetics are related somewhere, on some branch of the family tree.
Great movement in the picture!