The 35L is obviously THE choice, but as you say, not practical for you.
The 2/35 is one of the unsung heroes of Canon's lineup. Sure, it has some cons (e.g. the slower, buzzy AF) but it's a great lens at a great price.
The 1,4/30 Sigma is also a good choice, some some sample variation seems to exist. I'd suggest checking it out carefully.