Greatest evolution of a character on film?

[Notorious 1 E.Y.E.]

Always Sunny - Rickety Cricket went from a pastor to a street urchin that doesnt believe in God

The whole gang went from normal group od degenerates to

 

[calh45]

TV - Theon Greyjoy (Ain't no one transform more than that cat)
Movies -......I don't have a movie character for this one. I don't think the way a movie works allows them to change or grow in the way they can on TV.

 

[MooseMouthMthafuga]

Leroy Green

 

[MartyMcFly]

Optimus Prime
Starscream
Megatron
Soundwave

 

[ProfessionallyTrill]

No mention of Ellen Ripley?

From of these killing beasts to my children in Resurrection