I love the tall ones! Thry are great in the back of the bed also you don't have to bend down to enjoy them, or to hybridize with them. I prefer a nice 36" scape to a 22" scape. That being said I have plenty of short ones too.
Sergeant Major is a great red that doesn't need staking. 44"
Royal Celebration is also a nice one that does not need staking. 38"
I LOVE Dances with Giraffes, It is new here and I have needed to stake it, However I have seen mature clumps in others gardens that were not staked at all, with no flopping. So I am thinking once it gets established it is more stable( has a better foundation maybe).
here it is 60"
this scape flopped
these did not
Autumn Minaret is ginormous and has not required staking for me. 66"
Parrots Hilton 36"
Another favorite is Startling Creation 42" strong stout scapes on this one.
Velvet Ribbons is another great one.44"
Lillian's Womans Touch a dip is fantastic at 32"