From what I've read, ABP are just plain extortionists: "those are nice 'acceptable' ads you have; shame if something were to happen to them." Ghostery's business model makes it a bit untrustworthy, but it works pretty well as far as I can tell. uBlock is "you get what you pay for" freeware, so you can trust it as long as not many people use it. PrivacyBadger is developed by a small number of honest-to-God privacy zealots (in the best possible sense), so it won't get sold out, but will probably lag behind the curve.

I use a couple of them at once, block most JavaScript, usually run with cookies disabled, and pay a bit of attention to what's going on in the privacy news. For less tech-savvy relatives, I just install Ghostery and disable third-party cookies, since that seems least likely to break websites, and blocks most of the worst tracking.

Oh, and hosts-block tynt. Those guys should drown in burning kerosene.