Other than Football jig heads that I use to fish deep or rocks, I am not partial to shape and prefer Itsy Bitsy Jig Heads. I am however guilty for buying Structure Jigs (your first image) but I tend to lose them quick. I question the term strcuture.....does that mean you will lose them quick while fishing structure? That seems to be my experience. LOL
Back to Itsy Bitsy, they are reasonably priced and can be purchased anywhere and come in many different weights and colors. I am not a fan of their heavier offerings as the lead is poured over the shank of the hook and it makes plastics tough to rig but for your intended weight use, they would work well.