Help my flowers!!

The base - all falling down
Falling all over themselves

I don't know if these are the same flowers but they're to the left (in the shade) and doing okay.



I have these gorgeous perennials outside. We've lived here for two going on three summers and they've always just grown beautifully with zero maintenance. This year they're falling down all over themselves (they get quite tall!) and look like crap. I don't know what to do.





Someone told me to thin them out so I did, but they're not any better other than being sparse (They still fall down on themselves) I wish I knew what kind of flowers they are. They're quite tall (1 - 1 1/2 feet) and have large purple spiky flowers. HELP!





Edited to add some pics!