Which is more stressful to these plants: staying in a poor location, or transplanting to a better spot in the height of summer? See caption

I picked less than ideal spots for a few plants. First year, still learning! Wondering what you would do with these plants. We are about to enter a small heat wave, I would wait until after to move anything for sure.

(Southern NJ USA, 7b)

Pic 1: some type of sunflower. Was gifted to me, I forget the variety. It’s definitely grown by a foot or so since I planted, but it’s wilted and browning more often than not. Seems to not like the direct afternoon sun. Keep it as is and keep up with watering (maybe a shade cloth?), or transplant it to a shadier spot? I do water regularly in the AM, i give this guy in particular a little extra mid afternoon if he really needs it, but still seems stressed.

Pic 2: seaside goldenrod. As with the sunflower it’s grown quite a bit since I got it as a little baby plug. But recently it’s been looking a little sad, might also benefit from less afternoon sun. Keep or move?

Pic 3: swamp sunflower. These are doing great but I’m wondering if it’s getting crowded. Separate the stalks and space them out or leave it?

Thanks in advanced.