I'd have to give two:
Captain Pyjama Shark
Von Small
Best 2 teammates you can have.. Oddly, i dont think I've ever had them in my squad at the same time. They dont just follow you, or move with you, they contribute, they watch game, they take instructions and do their best to execute - be it cover-fire, smoke, spotting, are skilled in most kits, communicate, and are crack shots.
I can't count the number of times I got surprised by an enemy round a corner and had him fall down lifeless infront of me because one of my boys took em out just in time.
Best of all, we have situations, for instance of Sidi, with its large open spaces, or El Alamein, where they actually wait for the rest of the team to spawn before moving in force, cover to cover.
Bonus: I've had squads empty as people quit the game, and new teammates join, and found these guys remain even when we are down to just 2 people.
These are 2 guys you want want in a foxhole next to you any day of the week.