OP I just wanted to add on, you can use the ' Data Collector ' save to get ' Scum and Villainy '
Even though you had already killed all 3 kinds and scanned them at that point, all I had to do was wander a bit - the next bounty hunter I found popped the trophy immediately. You don't even have to kill the bounty hunter, just be in the same area (I literally didn't even see him).
I recommend anybody missing this trophy backtrack to the Mantis, I encountered my bounty hunter on the way back - THEN after go get Data Collector - I did them in the wrong order and got Data Collector first - then I said screw it, let's try to find a bounty hunter - so anybody looking at my timestamps will know, but it's possible to avoid if you look for a bounty hunter first. Don't make my mistake, basically.
If it doesn't pop on the way back to the Mantis on Kashyyyk, travel to the first planet and roam the map quickly, then come back. You should get it in that timeframe.
I had a stupid bug where Bounty Hunters didn't spawn in my game at all, ever period. I had 93% trophies, 100% everything - and played 10 more hours randomly wandering and they never spawned, so my file was obviously bugged. I wouldn't have needed to cheat if it wasn't for this bug - but no way in hell was I starting the game from scratch for 2 trophies.