It seems though like you want to have both a good balance AND excellence, fast learning and great colleagues.
My humble opinion is this can work out shortly, but usually not for long.
The reason being mainly that you’re describing a labile situation: as for any company that tackles a worthwhile and lucrative problem (and the others you really don‘t want to work for), but with a chill attitude and a „great engineering culture“ where resolving tech debt, fixing bugs and proper QA gets the front seat over product iteration — there exists or will eventually exist another company who sees the same opportunity, but attacks it with clear vision and the ruthless execution you despise, eventually sucking the more chill company dry of talent and customers.
I‘ve seen it all the time. Basecamp against Slack. Atlassian against Github.
Note I don’t particularly like this conclusion as well, since I was searching for something similar years ago, but I‘ve found it to hold true in practice. I stand to be corrected by counterexamples though, especially companies that have been around since a decade.