You have some lovely daffodil clumps, Mika. They look very happy.
I wouldn't really want to suggest daffodils to you, as the soil here is pure sand so very different from yours, plus we have the narcissus bulb fly so any surviving daffodil is my current favorite
That said I have been impressed with 'Golden Dawn' for its very long bloom and nice fragrance. However not sure how it manages in clay soil. I believe 'Petrel' was mentioned previously in this thread and I thought that one was fabulous last year when I tried it in a pot. Very powerful strong scent and very long flowering (but last spring was extremely cold).