We all have our favorites, don't pretend that you don't :P
I have this Colonists called Ryan "Boss" Jones. He is a valuable shooter and has defended my Base from countless raids, protecting my first play through on alpha 14 to this day. I have a mod enabled (not sure what one as i have so many) that shows me the records of his humanoid kills. it's well into the 100's. Best colonist i have ever had tbh.
Jezbear, Big Red, Vas, Zeiph, Axle, Tail, Wojtaz, Biduero they all are my favorite:)
Engie. Their backstory makes you think, "This person is from TF2. Some donating mother hubber paid money to have the tf2 engineer put in RimWorld, and be nicknamed Engie.
out of the backer ones definately Riesling Bacchus
Tail is one of my favorites. Art and shooting are interesting skill choices, not many backgrounds give those together.
anything male medium body, have high shooting and high social
fit on leader criteria
give him red beret and glasses (thru mods thou)