As sad as it sounds - create three (or four) different email accounts on different hosts (And No - I don't mean just myname+spam1@ myname+spam2@)
Use Gmail for the business one, a paid for one for your professional profile, one for your LinkedIn account (because lord knows that one will get the hell spammed out of it but meh if you want to be a player that's where the action is), one for random social interactions (conferences, meet-ups etc) and a final one for friends and family. Set all accounts except for the last one to silent notifications.
The 'fight-back' battle was lost twenty years ago and so were the technical means for doing so, these days the best you can do is play with the broken machine rather than trying to fix it or invent a better one.