@emfish55: You forgot cardigans, which were my go-to top once it got a little chillier. Cardigans and sweaters. Also, most of my tshirts weren't "tshirt" shape so much as jersey tops, which I think helps combat the whole "college-y" thing.

I didn't figure this out until my last year of grad school, but this is a pretty handy uniform that is versatile and inexpensive: