I'll add few authors of for fans of traditional style.
Rex Stout. Wrote about eccentric, but brilliant, private investigator Nero Wolfe. Wolfe is such 'well build' that he won't leave his home, but under most severe emergencies. In investigations all legwork is handled by his assistant Archie.
John Dickson Carr, who also published under pen name Carter Dickson. Carr specialized writing 'locked room mysteries' and other impossible sounding crimes, which usually have
very complex solutions.