Seemingly, your opinion isn’t all that unpopular here.
As many of this forum are already aware, I’m a huge fan of Eric’s music, and that extends beyond just his guitar playing and his instrumental pieces.
I think some of the criticisms of his voice here are overly harsh. He has good pitch and his range and projection are adequate. Timbre is a matter of taste.
There are many famous singers who are technically inferior to Eric as vocalists. The vast majority of popular music is vocal music, and proportionally very little of it features exceptional vocalists.
Limiting the discussion to vocal music featuring virtuoso guitarists, precious little of it features an exceptional vocalist also. Among the elite virtuoso guitarists themselves, I’d struggle to name a single one that was also an exceptional vocalist.
I’d initially be inclined to say Richie Kotzen, until I remember real exceptional vocalists: David Coverdale, Roy Orbison, Whitney Houston, Freddie Mercury, etc.