Perennials don’t live forever
The perfect hardy perennial would bloom all summer and live forever.
Since that doesn't happen, many of us try to maximize what we get from perennials by choosing plants that bloom for long periods. And to save money and time, we prefer they have a very long life.
This list is not meant to be all inclusive by any means, but every hardy perennial here is considered to have a long bloom period and long life. Care habits and conditions in your garden can certainly affect both blooming and life, so if something on the list dies in your garden, it could have something to do with soil, sun, wind conditions or care habits. And be sure to check hardiness in your zone, but you will find most of these to be hardy for most of the midwest and north.