I suppose the 'best' character could be interperited many ways.
First of all, I'm going to assume that you are talking about the 4th, 5th, and 6th movies, because they are what most people mean when they say 'Star Wars', with the general exception of the person who thinks the prequel movies are better!
ANyway, if you mean who is the mean character, that would be Luke Skywalker. Luke is the obvious focus of the Orriginal Trilogy, and therefore could be considered the 'best' character. However, there is also a very good argument, in my opinion, for the character of Obi-Wan Kenobi. Without Ben Kenobi, Luke Skywalker would likely never have been found, and the rebel alliance would have continued to get blown up until who knows when!
Finally, one cannot ask the question of "Who is the best character in StarWars without expecting to get at least a few Jar-Jar Binks trolls for answers.
Obviously, the best and most important character is Jar Jar, because without Jar-Jar, there would be no moral support for Qui-Gon Jin, and he would likely have just fallen appart before he ever even encountered Darth Maul! If Qui-Gon lost the will to live, who is to say that Obi-Wan and other Jedi would not do the same? Young Ani would never become a Jedi, Luke would never be born, and, again, anything could happen!
who is the best character in star wars? post ur opinion here!
jar jar binks: 1
Ben Kenobi: 1
boba fett: 2
chewbacca: 2
yoda: 2