Grenadier, I might suggest a good selection of Erythronium species to get you started, giving you a range of colors and flowering times, would be E. tuolumnense (yellow, early blooming), E. californicum "White Beauty" (white, later blooming), and E. revolutum (pink, later blooming). All are generally available, and are relatively well suited for general garden conditions, as long as they aren't too wet after they go dormant. As an added bonus, the first two increase from offsets, so every few years you can divide the clumps and increase the size of your patch at no added cost (there are also forms of E. revolutum that produce offsets, not sure however if any have been named).
Ed