Sounds a bit similar to my soil. I can grow cabbages and sprouts but so far no matter how much time and effort I put into preparing the soil the results are always a bit variable and iffy. PSB on the other hand, seriously thrives in any location with no special preparation.
My Tuscan Kale always does beautifully too so you could add that to your list. Also, for some peverse reason, my noisette sprouts don't blow half as much as any other sprout I've tried (now several varieties) and I was surprised because I've read in at least two books that they always blow even for experienced sprout growers! So perhaps they prefer light, free-draining soil, different conditions to other sprouts. A few always blow at the bottom, but in the main they remain sound.