The man himself

Thrawn was cool enigma, but it was Mara Jade who stole the show for me. She had an absolutely amazing character arc and was such a natural fit to join the main characters.

Thrawn followed by Talon Karrde

Mara Jade, but I voted for Pellaeon because I figured he'd need some help.

Pellaeon and Talon karde. Pellaeon became one of my favorite characters and my favorite imperial over the course of the trilogy. he gave me a perspective on the empire that I hadn’t seen or related to before. talon karde’s smuggling strategies, broad knowledge, and charisma always made me smile while reading. Although I love most of the characters in these books others that i loved include mara jade, thrawn himself, and garm bel iblis

Thrawn was definitely my favorite. What a great villain. Brilliant mind, an ambiguous mix of ruthlessness and honor. Although I generally sympathize with the Rebellion/New Republic (in other words: the good guys), Thrawn just captivated my interest, enough that I was almost hoping for him to win.

My second favorite would probably be Pellaeon, closely followed by Karrde. Pellaeon is really one of the few individual Imperials I've come to like. He was such a competent officer in the trilogy who didn't seem as arrogant as lots of other individual Imperials and he also seemed to care about his crew. Being a supporter of the Empire and also showing a bit xenophobia now and then, he's not exactly an outstanding rolemodel but he seems to be an Imperial with more morals then many others. He just seems like a grandpa figure, lol. Especially in the Hands of Thrawn-duology where he's even more liekable.

Karrde is a fascinating character as well. An astute smuggler who knows how to play the cards he's dealt with.

Number four would probably be Aves, number five Mara, and finally Ghent. However, I liked all of them when reading the trilogy.

^I agree. Garm Bel Iblis is a great character as well

Thrawn, Mara or Ghent.