By all accounts, the "organized" ride known as Eroica CA sucks.
Why do you say that. Have you ever ridden it? The Eroica CA ride has been great every time I have ridden it and I think most people agree. There is the issue of the two post-Covid rides having very spotty on route support, but the ride was still great.
And here's your list.
CBA
CR West
Cino
Forgot, Rosebowl
I already named two of those (Cino and CR West) and noted that CBA does not appear to be a ride. What is Rosebowl? Are you referring to the very small informal monthly ride? Hardly qualifies as something to travel to. Perhaps there are no other US vintage rides, though it seems that I've heard of some through the gravevine.