I only like to do slight PP on my photos, otherwise you spend all your time processing them and you end up not even touching most of your images in the end. So I often crop a little, unsharp-mask if it's a heavy crop or it's an important photo that I can't reshoot and needs some sharpening, and may tweak the curves slightly.
Sigma 30 is giving me awesome photos straight out of the camera. Sigma 150 is too. Canon 400 F/5.6 regularly delivers, but due to the nature of what I use it for (birding) they generally get some heavy cropping so get a little more work. Now that I think about it my Tamron 11-18 and Tamron 28-75 both give nice results straight out of the camera. Ultimately I've chosen my lenses in that way.
One thing that bothers me is when people ignore poor CA performance of a lens because "it can be fixed in PP easily". Personally I don't find it all that easy in most cases, and just cannot be bothered.