In canon, Voldemort did possess people against their will, including Harry (despite his mother’s protection) in the climactic Ministry scene in Book 5 (although it was a struggle that Harry shortly won).
He inhabited Harry briefly, but it’s not clear that it afforded him a useful degree of control over Harry’s body, and as Dumbledore noted, inhabiting Harry caused Voldemort excruciating pain. Considering the way their magic has been shown to interact in MoR, I’d think any attempt to possess Harry would turn out even worse in this canon than that one.
In canon, Voldemort did possess people against their will, including Harry (despite his mother’s protection) in the climactic Ministry scene in Book 5 (although it was a struggle that Harry shortly won).
He inhabited Harry briefly, but it’s not clear that it afforded him a useful degree of control over Harry’s body, and as Dumbledore noted, inhabiting Harry caused Voldemort excruciating pain. Considering the way their magic has been shown to interact in MoR, I’d think any attempt to possess Harry would turn out even worse in this canon than that one.
As far as Harry goes, I agree, but possessing some other dictator would be much easier.