Level Up & OSR Enthusiast
Rogues are actually pretty good at going toe to toe. Their AC is at least as good, they can just about always get advantage for high damage on sneak attack, and they have evasion to break glass in case of explosion.So you take the noble background and don't min max totally focused on combat. My first PC in 5E was a fighter. He didn't focus on being charismatic, he was an investigator, and it worked just fine.
If you want a fighter that contributes (mechanically, you can always contribute in other ways) you can make it happen. Is he going to be as good as a rogue who has the same focus? No. Then again the rogue can't go toe-to-toe with the bad guys either.