The current work presents the development and characterization of melt blended PLA based composites with a broad spectrum of filler reinforcements:​ Lignin/Tannin, PHA/TPU, and Carbon Nanofibers. PLA was kept as the major phase in the composites with the weight fraction being ≥ 85wt%. Lignin was shown to impart stiffness of the PLA matrix and Tannin can provide high interfacial damping. Lignin also inhibits crystallization with almost complete inhibition at a heating rate of 15 °C/min. TPU was shown to impart ductility to PLA and PHA imparted a large increase in the damping. PHA and TPU also imparted higher impact strength to PLA. Carbon nanofibers in PLA result in high strength and stiffness composites. The maximum momentum transfer during impact is also lowered which is believed to be due to large amount of fiber pullout. CNFs promote crystallization which is prominently seen in the cooling cycle.