Not sure if you wanted the top 5 performers, or just the top 5 favorites on flowers. I'll do performers.
Arrogant Bastard - a Curt Hanson intro, has one of the best daylily plants I have ever grown. Healthy, lush foliage, lots of scapes, bud builds so each scape has had at least 40 buds, usually over 55 - and tree-like branching. Add to that a wonderful deep ruby red to purple bloom with a deep green throat.
Fabulous Freida - a David Kirchhoff intro, continues to amaze me. Great branching and decent bud count for a plant that has not been here very long. Each flower was absolutely perfect.
Spacecoast Tiny Perfection - a Kinnebrew intro, continues to get better and better. Flawless flowers, that are usually sculpted, on very nicely branched scapes with high bud count and nice foliage.
Nutmeg Elf - an older one by McCabe. Huge clump that bloomed and bloomed and bloomed. I like this one so well that it anchors the perennial bed right by my front steps. Here are some photos of it this past summer.
Leprechaun's Lace - an Elizabeth Salter intro that is so old, it is an Elizabeth Hudson. I adore this plant. One of my best instant rebloomers. Never fails. It is in a prime spot along my front sidewalk, and is surrounded by pulmonaria, hosta, Japanese Painted ferns. One of my best performers, year after year.
Holly Dancer, a Dottie Warrell intro, continues year after year to be in my top 10. Clear color, high bud count, great branching. I love it. Fabulous parent.