When it comes to singing narrow, and transferring the qualities of the EE and EH vowel so as to narrow and morph the nature of other vowels, this does not apply solely to tenors. Here are some of my favorites:
Basses: Giulio Neri
This is just to name a few that come to mind. I love all these singers. The sopranos are quite extraordinary in demonstrating narrow sound… these are all great singers.