Here is my top ten of the ones I have owned. No real criteria as any of them will perform in the field just my heart telling me which I like best.

1. George Gibbs Farquharson
2. Alexander Henry hammer falling block
3. Daniel Fraser falling block
4. Westley Richards 1881
5. Trade Farquharsons including Jefferys
6. 1902 Webley
7. 1897 Webley
8. Field patent falling block
9. Westley Richards 1869-71 patent rifles
10. Westley Richards 1897 (last just because I have not yet owned a real good one. Surely would rank higher for me if I had)

If we were to include Rook sized actions, there would be an entire list of their own!