Fast, simple to use, works in the editor and at runtime. This asset is the one for you if you're looking into importing OBJ models!

This importer not only supports importing the OBJ mesh, it also supports:
-Ability to load OBJ file from stream -mtl file loading, and texture loading (dds, crn, jpg, jpeg, png, tga [24/32 bit + rle], bmp) -Triangle, Quad, and Ngon import -Fast loading times -Works in both the editor, and runtime* *see readme for runtime requirements