judge [judges](someone with valued opinions) noun [UK: dʒʌdʒ] [US: ˈdʒədʒ]
intenditorenoun {m}
connoisseur [connoisseurs](specialist whose opinion is valued) noun [UK: ˌkɒ.nə.ˈsɜː(r)] [US: ˌkɑː.nə.ˈsɝː]I'm a cheese connoisseur. = Sono un intenditore di formaggi.
maven(expert in a given field) noun [UK: ˈmeɪ.vən] [US: ˈmeɪ.vən]