All the Telltale games are easy platinum when they have a platinum. Also Heavy Rain and Beyond Two Souls (but those 2 require some replaying). I also thought LEGO The Movie The Videogame was a easy platinum but harder then the rest I mentioned above.
Definitely the telltale games, though The Wolf Among Us is a little more difficult cuz it makes you choose different options to finish it. I've got: Batman, Tales from the Borderlands and Game of Thrones...still havent finished Wolf. Another easy platinum is Horizon Zero Dawn and Far Cry 4 and Primal. Also Gravity Rush Remastered is fairly easy too. Infamous Second Son will require at least 2 playthroughs. Assassins Creed 2 is fairly easy, just a lot of stuff to collect. Fallout 4 took a long damn time to get. And Battlefield 1 was fun to get, especially the online trophies - I usually avoid those like the plague cuz I suck at pvp multiplayer (like the ones for Injustice 2 & MvC Infinite), but some of the trophies are difficult when you have combat challenges to complete, and field manuals & codex entries to find.