Having some spare time I decided to improve my blender modelling. Today have I tried to model a human ear.
Attachments
ear-extruded.blend (523 KB)
ear-extruded.blend (523 KB)
That really looks good I think. Doing the ear without sculpting would definitely be quite a challenge. 
I can’t really think of anything that might make it better other than just refining the shapes you already have to give them more definition in areas like the earlobe and things like that. I guess one thing I thought of might be that it seems like that whole area right before where the ear canal is at could be quite a bit deeper, but other than that I think it looks good