Sheev Palpatine is the Supreme Chancellor for life of /tv/.
He is best remembered for his duel on Coruscant with Jedi Masters Mace Dindu, Kit Fisto, Agen Kolar, and Saesee Tiin. During the fight, Mace redirects Sheev's Force Lightning and he either gets disfigured by the lightning or his true (ugly) form is revealed. He ends the fight by having Dindu maced with lightening and thrown out a window (it's like poetry).
He is also known as "The Senate".
Sheev is perhaps best known for his signature move, the Sheevspin (it's a good trick). With it, he is able to easily overcome even opponents that have the high ground. When he actually does have the high ground, he becomes invincible, as seen during his duel with Yoda. The only way to defeat Sheev is by throwing him down a long shaft, giving him the lowest ground possible.