George Luz pretty much owns this. His mimicking of Sobel and Dike's voices are some of the few funny moments in an otherwise grim series.
During training in England, Luz impersonates Major Horton's voice, fooling Sobel into cutting open a barb wire fence. The next scene shows an angry Lt. Colonel Strayer chewing out Sobel for setting loose a herd of cows which are now wandering all over their base. Sobel is made to look even more foolish when he finds out that Major Horton isn't even on the base.
During the impersonation scene, when Sobel whirls around and bellows "Who said that? Who broke silence?" The private behind him, desperately trying not to grin, remarks "I think it's Major...Horton, sir."
Also, this particular exchange during Why We Fight:
Frank Perconte: Hey, George. George Luz: Yeah? Frank Perconte: This kind of remind you of Bastogne? [comedic pause, including bemused look] George Luz: Yeah... now that you mention it. Except, of course, there's no snow, we got warm grub in our bellies, and the trees aren't fucking exploding from Kraut artillery, but yeah... Frank... other than that, it's a lot like Bastogne. Frank Perconte: Right? George Luz: Bull, smack him for me please? [thump] George Luz: Thank you.
And then the "captured" Brit asks "Is that the enemy coming?" When Winters realizes it's Sobel approaching, Winters mutters "Actually, it is."
"HI-O SILVER!!! Anyone who has served in the military has known at least one officer like Sobel, and can vouch that this is not an exaggeration.
During the battle to take Carentan, the battalion staff officers are hiding behind a wall, whisper-yelling to Winters asking if it's safe to come out. Winters tells them it is, exchanges incredulous looks with Nixon, and a moment later gets shot in the leg. The look on his face just screams "Really?!"
"We're paratroopers, lieutenant. We're supposed to be surrounded."
"This guys reading an article that says the Germans...are bad." *nods*
YMMV on this being Harsher in Hindsight as the trooper was probably reading something about the sort of thing Easy Company finds when they get to their destination.
Winters slyly letting Guarnere know he knows about the Quaker story Guarnere's been spreading around, and that he's not.
Soon afterwords, Guarnere jokingly muses that Winters must be a Mennonite, then.
When Winters unsuccessfully tries to rouse Nixon from bed, he resorts to dumping a pitcher of water on him, only to find out from an angry Nixon that it wasn't water in the pitcher, it was Nixon's urine!