Dwarves

Dwarves are all very polite, well groomed

Don’t drink, are all refugees essentially. Quiet, good at politics and intrigue and scheming, keep records and knowledge sources, scientists

Quiet, wise, and always uneasy. Live extremely long natural lives. Natural administrators, and adept scheming politicans. Used to live in huge underground settlements, but.

Tiny dwarven remainders of clans take refuge in human cities, all their clansmen extinct. Maybe a small council organising them.

Dwarves used to live in villages, only returning to their castles in times of need - like helms deep

Distinct from Duergar.

Dwarves worship an element.