Polymaker PLA PRO Filament 1kg, Tough & High Rigidity 3D Print General Flat Dark Earth 3D Printing Filament, PolyLite PLA PRO High Speed, Print with Most 3D Printers

The most engineering-minded consumer brand in this space. Polylite is their everyday PLA, PolyMax adds impact resistance, and PolyWood nails the timber look. They publish data sheets and actually explain what's in their formulations.