I’ve been using BlockBadQueries on all my WordPress websites for quite some time now. And I just realized BlockBadQueries Pro was released in June. The Pro version offers more minute customization options than the free version though if you just want to set-and-forget I suggest sticking with the free version.
BlockBadQueries is based on the 5G Blacklist 2013 and the 6G Beta. So you could certainly copy the rules into your
.htaccess file if (assuming you’re comfortable with Apache commands & regular expressions) you want to customize the rules for free.