Excellent post, and nice images.
Though you say the last two lenses are sharp, i'm going to picky and say that the images you posted do not seem particularly sharp
I've not heard of those first two sigma lenses, very interesting.
I'll add a one
Canon 100-400L f/4.5-5.6
Very versatile lens, not too heavy. Focussing is ok, and lens generally not suited for low light, but images are otherwise excellent.
hope more than one image was allowed