Which vegetables thrive in heavy soil?

It's the second year of planting in this patch.
I had success with potatoes (Wilja) Spinach and French Beans lasy year
but a poor show of onions and as for the radishes!

The patch has received 2 loads of horse manure/straw, but it is still
hard work. The soil does not till very well, clups of soil form on the
rake.

Thanks

Jonathan