hmmm...
for fighting you gotta give Dooku cred, I mean he whooped Obi and Annakin and then stood toe to toe with Yoda... Mace Windu gets cred for his to the point no funny business fighting style, a diplomatic voice that has reason and can give orders that will be followed without pulling an Obi, and plus he is played by Samuel L. Jackson... Yoda is, well Yoda. They used the digital double a little too much for me to choose him though, sorry the puppet may not be able to fight but the puppet Yoda is loads better looking then the digital one... Padme is hot and is probably the only diplomat that could stand her ground with Mace on one side and Palpatine on the other... and then there are the Rosenstanz and Guildenstern characters that you just wanna see more of, Zam, Kit, Shaak, Dexter and of course Aayla Secura...
I went with Dooku because he had the hardest part, he had to have the moves of Maul, exude the Evil of Vader, and have the duplicity of Sidius
(the only way that he is going to be gotten rid of is for Anakin to take him from behind when the Senator convinces Anakin that Dooku is an assasin sent to kill him. And of course Sidius will coax Anakin to the dark side while the fight ensues)