The Wicked Wedge gap is filled by the ton of shawarma and banh mi places. There's a LOT of good cheap eats on 17th still.
There's also this: The burger at Farm, which I had for reasons I can't specify never had before today. INCREDIBLE. They actually asked me how I wanted my burger done! I got it medium rare- spectacular. The side salad (no fryer, so no fries) remains one of the best side salads I've had in North America. As good as the greens you get in Europe.