Top Left: Bilbo snaps while trying to get the ring from Frodo in a moment of weakness at Rivendell in Lord of the Rings.
Top Right: The ghostly bodies under water in the Dead Marshes where Gollum is leading Frodo and Bilbo in The Two Towers.
Bottom Left: Galadriel refusing the ring from Frodo while freaking out and explaining how she'd become evil if she took it in LotR.
Bottom Right: Part way through Smeagol's transformation into Gollum in The Return of the King.
Oh god, I just had a flash of a near future where he's on the US ballot somehow. It wouldn't be a huge surprise if he found a way. He could change the name of the States to X too!