Polymaker High Speed PLA Filament, Black PolySonic PLA 3D Printer Filament 1kg - Stronger Fast Printing PLA Filament Compatible with Most 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.