Se7en doesn't have a boss fight, but it does have a box fight.

Also, Henry: Portrait of a Serial Killer and Manhunter (the predecessor to Silence of the Lambs) both came out in 1986. I was only 6 at the time so I cannot speak from memory on their impact, but it is my understanding that Henry was well received for its bold, realistic and unflinching take on serial killers.

They are certainly both better than the slasher movies released that year (Friday the 13th Part VI: Jason Lives, Psycho III, The Texas Chainsaw Massacre II)

I think we're clear for Seven 2: Fourteen: Even Sevener. There's no way Mills goes to prison under the circumstances. He gets off with temporary insanity and undergoes court-mandated therapy and 5 years' probation and eventually gets rehired to the force with a desk job in the Evidence room.

The real crime, of course, is the fact that Somerset makes no physical attempt to stop Mills. For that, he loses his job and becomes a hotel concierge, where he eventually meets an aging socialite and travels the world solving crimes in high society as private detective.

Jon Doe (note the spelling on the leather shop receipt), actually recovers from his wounds and ends up a zombified husk in the "brown level" of a state mental asylum.