After much deliberation, I have selected the following:
1. L. kesselringianum
2. L. wardii
3. L. davidii
4. L. martagon (can't pick a variety... too many nice ones!)
5. L. amoenum
I must point out that I have not succeeded in growing any of these to flowering... my second attempt at growing L. davidii from seed has returned this year and L. wardii (bought as a flowering-size bulb a couple of years ago) will hopefully make an appearance after the stem was damaged last year and I lost its first bloom.
Some of my seedlings of L. callosum and L. candidum have returned but aren't flowering size yet.