This is a little bit difficult. I used the 35mm f2 for quite a while as a walk arround lens. It is small, and the IQ is good; AF is noisy but fast enough. FoV is just a bit too narrow for my taste (56mm eqv.)
The Sigma 30mm f1.4 got me quite excited, but the old version had horrible short focusing distance, which itself was a killer for me. The second generation improved in this aspect to an acceptable level, but I was hoping for Sigma 35mm f1.4 IQ, which it can't deliver, actually, the improvement over gen. one is not that big.
I then considerd a zoom option. There we have the 17/18-50/55 f2.8 options from Canon, Sigma and Tamron. The Canon being the best (and most expensive), then there is the nice 15-85mm, and Sigmas 17-70 is also in the mix. To make it short, the f2.8 were too expensive and lack some versatility (and when I really need fast glas, I take a prime), the 15-85 has a nice zoom range, but it is a bit slow, and IQ could also be a bit better (and it overlaps to much with the 10-22 at the wide end), so I went with the Sigma 17-70 and I'm very happy so far. IQ is great, the zoom range is nice. It works almost silent. And it is smaller and lighter than the other options.
But no, there is no "Best" normal lens for APS-C, there is only the one that suits your personal needs the best.