SpamAssassin and friends still do a reasonable job for me, and have for years. I delete a handful every day, but like the parent I've had my email address since 1996, and I haven't been too careful about using it. If I had to do it over again today, I'd look at rspamd. Getting people to accept your mail can be a pain in the ass, yes, but it's not impossible.

* Get a "clean" statically allocated IP address.

* Control your forward and reverse DNS and make them match.

* Set up SPF/DKIM.

* Fill out the Yahoo Bulk Email sender form

That last one probably isn't really necessary, depending on how much email you send to Yahoo.com addresses.