The first and last pic look BCA to me. Boa constrictor Amerali

Bolivan red tails.
They have peaked saddles and small tail. Those 2 have small tail vs the standard
imperator boa.

Saddles donesn determine locality.
But things like short tails. Small overall size. And low vertal scale count
Does.
Imo there beautiful Bolivians. Iv had a couple that looked exactly like the first pic.
Bcc boas happen to be some of the largest boas not including anacondas.