Don't know any names but absolutely love that last one, Steve!

The last one:Teni?
Is the second last Japanese? looks a bit like Leda.
Any more pic for the third last? There are many red Japanese tree peonies.

Based on when I purchased, them the bottom one was listed as Meikouhou, the 2nd to last was kokuryu nishiki, and 3rd to last was Taiyo, but it's tough to tell if they are what they are supposed to be.

I got them from Van Bourgendein a few years ago.

I was going to suggest 3rd to last as being Taiyo. Meikouhou for the last one - sure could be! (Though, I would have said Teni, too. Does it have the flares they keep showing in pics for Meikouhou?) I ordered Meikouhou from a supplier in Canada that has exactly the same tree peony merchandise for sale - dutch bulbs, same collection names, similar prices, etc. However, mine hasn't flowered so we can't compare. Your second to last - is the colour accurate in that picture? I bought a tree that was supposed to be Kao, but it sure looks like Kokuryu nishiki. Look at the outer petals and the bud to the left. Our foliage seems to be identical. It grows like a spear, too. Does yours?

Also, Steve, did you find a name for the unknown cultivar you posted last year? Your choices were Yaezakura and Kamatafuji. I mention it because it looks like my Yachiyo-tsubaki - the colour and form.