Yep, "Stinkbugamus Yuckyuckamus" (Latin name) But I've only smelled them when they are crushed. HOWEVER, if you look closely at the lower left hand pic that one looks to me like a Spined Soldier Bug...notice in the upper pics the stink bugs body is a bit elongated and has no shoulders? Now look at the bug in the lower left pic...notice it has very sharp "points" or "spines" on its shoulders? Also its rear end is more rounded. They are actually beneficial bugs. (Course now, am sitting here w/only one good eye, and it may be the angle of the pic that is throwing me!) Does anyone else see it?
I had my former entomology prof take a look at these, because I have those nasty top buggers in my garden. Here's what he said:
The top two pictures are of Leaf-footed Bugs (Family Coreidae), apparently the "Florida Leaf-footed Bug" (Acanthocephala femorata (Fabricius)). This species typically lives in meadows, unmowed ground, and adjacent areas, feeding on plant juices. When handled, it gives a foul-smelling secretion. Adults fly if they are approached rapidly. Many similar species are widely distributed in the East.
The bottom two pictures are of Stink Bugs (Family Pentatomidae), as you said. However, the photographs do not provide enough detail for me to be able to guess these species.