Rogues don't just "contribute" to combat, they're great at it. Just in a different way than fighters. That's part of the issue, sure fighters are great at combat, but there are no 5e classes that are bad at it.So, since rogues as skill monkeys can also contribute to combat, and casters can contribute to--well, everything with the right spells... how do you feel Fighters can't?
No, I don't think so. I just see that outside of combat, I have to be careful to make the fighter have something to contribute (as in more careful than the other classes).Are fighters better at exploring than rangers? No, that is their "thing", but fighters can still explore pretty darn well with the right skills. They can intimidate well (especially if you use the variant STR-based instead of CHA-based skill).
I wonder if your fighters aren't contributing as much because of your play style more so than the class??