I don't recall if these are mentioned here or not, so I'll put them here, anyway.
Mekakucity Actors, you find out that the teacher (the only teacher you really get to meet as a character) is actually possessed by one of the "snakes", which takes full control of his body whenever he sleeps.
In Blade and Soul, it is heavily implied that Varel Jin has been having her true personality repressed the entire anime thus far by unknown means that are somehow related to the Impurity and that Ran Yu (the women she's often with) is involved somehow. While not explicitly mind control, it seems she was being manipulated in some fashion.
In Nobunaga the Fool, King Arthur has the ability to make others see what they most want to see in him. Meaning, no matter who looks upon him, they will always see their ideal leader. Alexander, the Great saw a perfect, god-like man, where as Julius Caesar saw an innocent woman with pure intention. He uses this power many times throughout the series to sway others onto his side.
In a recent episode of Naruto Shippuden, it's revealed that the Uchiha clan all share a very unique trait. When one very, very close to them dies, such as a dearly beloved, a part of their brain (that only they have) fills with a special chakra, essentially causing them to be filled with an extreme hatred and rage. It is implied that this changes their nature to one of hatred and aggression, and that it's impossible to control after that point. While not exactly mind control, it's a unique, almost magical transformation of the mind that only they can experience which changes their personalities on a fundamental level, so it's close enough.
In Captain Earth, each of the designer children are actually vessels for the souls of an immortal alien race known as the planetary gears (unless I'm confusing names), who have had their identities sealed by, apparently, having their "cores" put to sleep (the core is where Planetary Gears hold their memories - it is, almost literally, their core). One designer child reawoken as a Planetary Gear, Moco, holds the power to reawaken their cores by kissing their vessels (their current bodies). Doing so causes all their memories to flood back, causing extreme and sudden shifts in their current personalities in a way that feels like "corruption".
That wraps up what I can think of off the top of my head for this past season of anime.