Bower, Pulmonaria should self-seed. I'll see if I can capture some seeds for you. I've never tried before. It's not a shrub, so unfortunately, you cannot make more by anchoring a stem to the ground
I just bought a Cranesbill called "Biokovo" (plant of the year in 2015). It has pale pink flowers and is deer and rabbit resistant. It begins blooming in late spring, but I just thought I would mention it.
So sorry to hear about your mouldy Forget-me-nots and your non-returning primroses, but you are lucky to have cowslips
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Forsythia is one of the earliest shrubs, and Daphne, as Growingcoastal mentioned, is a really lovely, early, fragrant shrub which bees will love! I grew the Carol Mackie cultivar twice and both times the main stem got enormous, cracked, and the plant died after a few years. Even so, it is well worth growing.
Chives are lovely! I don't think one can have too many in a garden
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Linda