I recently purchased several really tall daylilies:

Hemerocallis 'Getting Airborne', Hemerocallis 'High Falootin Floozy', Hemerocallis 'Notify Ground Crew', Hemerocallis 'Panic in Detroit', Hemerocallis 'Scandinavia', Hemerocallis 'Sears Tower', Hemerocallis 'Stargate Portal', Hemerocallis 'Towering Robin Hood'

anyone have one that i could add to my collection?

OK, you can not really call that a collection, but it's a start:)

For tall daylilies I think that is a petty good collection.

I maybe not dark ones, but I noticed twixanddud has some tall ones listed-Festive Jousing, North Wind Drifter, Ivory Titan, & Navajo Pony are over 40" tall. I don't have any of those, myself, so can't say how well they would grow for you. Plants I have received from Laura have been very nice, you can ask her if they indeed grow as tall as the specs say.
I like taller ones too, don't have very many though, I need to add some. I can recommend one that is fairly new to my garden but I'm impressed with it-Final Frontier, it is a very late bloomer too.

These are new to my garden this year, but I'm impressed already.

Skin and Bones, dormant dip hardy to zone 3. Colorfast thru sun, humidity and rain. Strong scapes. Woodhenge intro and they have a lot more stunning tall and lates to choose from. First year over 36 inches, next year I expect it to meet or exceed it's projected 46 inch height.

Venous Blood Huben intro, dormant dip to zone 3. Crocosmia behind is 5 ft, Monarda in front is 4 ft. Treeclimber has shared some wonderful pictures of this CV, check them out. Projected height 50 inches. Got mine from Valley of the Daylilies.