It's not one very easy question because there are the breeders from long time and the new ones so.......
i'm going to try to reply but, in 2 parts
1/ Gabriele PROSPERI
2/ Pierluiggi PEZZANO
3/ Roberto ZORZI
4/ Massimo SANTINI
5/ Mr & Mme Yannick Cordillet. It's now Mr Philippe Cordillet (son of them)
I love also very much Mme Olga SAYGANOVA from "SERGIUS ALECSANDRIJA " (For me, she's one of the BEST about ALL she makes for Dobs), Dejan from "ALTOBELLO", Slobodan "BETELGES", Daniela & her husband "CAYA", Dragan "RENEWAL", and Daniele "ARDENS".
So Sorry but it's Impossible for me to choice just 5!