I am now ready to answer my own question -
I have been trying out more antennas and I believe the answer is NO - I have not found an indoor FM antenna significantly better than the Terk FM+.
I tried the Godar, the Tune trapper, a Radio shack folded dipole, and a single-wire antenna that came with my receiver. The Godar was clearly the worse. The Tune trapper was OK but not as good as the FM+. The single wire antenna was actually OK on a lot of stations. The Radio Shack folded dipole did pretty well and beat the FM+ on some stations. I did not try any of the rabbit ear style antennas due to WAF concerns - maybe some of those would be better.
My tuner (Sony ST-SA50ES) supports two antennas and in the end I decided on the Terk as antenna A and the Radio Shack as antenna B. Between the two I get decent reception for most stations within about 30 miles.
Mark