The best fig tree for YOU will of course depend on your growing skills, resources & LOCATION(climate, terroir...). Doubt if the best fig for California will be the best fig for Maine
After 25 years of growing figs in Zone 6, the black fig that grows best, produces the most & tastes best for me is Ciccio Nero. My fav black fig! At this time have many many producing fig trees and Ciccio Nero still produces 80% of my black figs. Even produces if left unprotected in Zone 6 winters. This fig should also grow well in wet harvest areas since next to impossible to get it to split.
If I was a white fig lover I would recommend Fico Bianco as best & easiest to grow cool climate producer and for those willing to put a little more growing effort Dalmatie really shines in taste & production.
Also of course in cool climates ALL healthy Mt. Etna type figs do well & have been long time favourites(Hardy Chicago, Marseilles Black, Sal's Gene, ... I have 12 of them all very nice tasting, productive & easy to grow). Get a healthy specimen & you can't go wrong.
Many many great tasting runners up that are looking great but after 4 years my jury is still out whether they are consistent producers in cool zone 6 climates;
RdB, Petite Negri, Atreano, Melanzana, Negronne, Peter's Honey, Strawberry Verte, Sicilian Black & Red, Brunswick/Goutte d'or, Drap D'Or, Sucrette, Vine, Yugoslavian black huge, Bianchetta. Pastilliere, LdA, Desert King (if properly san pedro type pruning & extra winter protection), Gisotta Nero, Neveralla, LSU Gold, healthy Celeste, VdB...
Ask me again in a year and my list may change but I know who will retain #1 black fig title.