Heck it was good enough for Herman Melville and T. S. Elliot, and Geoffrey Chaucer, I wouldn't knock it! Welcome back! I have heard of natural baritones singing second tenor, especial Wagnerian tenors, but first tenor!! It sounds like you have the range that Julie Andrews did, although in a lower register. Of course it looks like we are short of tenors, so you will likely be stuck there at Entmoot.
I'm not knocking it. Just faciing the reality that I can't pay the mortgage with it (just yet)!.
As for the tenor thing, I should point out that I sing 1st tenor in the choir. I wouldn't dream of doing a 1st tenor solo. There's a lot of difference in having a good choral voice and a solo voice. Any solo I'd drop down to at least 2nd tenor if not baritone. Singing first tenor has indeed stretched my range. In college I could've hit those low notes with g'nad. I can still get close, but there's no "depth" to the sound.