Modern stuff? Honestly, I cannot think of anything. Most comics Post-10s are downright awful. Between 2012 and now Thanos got milked dry my Marvel and Disney. There's really nothing worth wasting time and money on. You're better off going back and reading the old stories. The Thanos Quest. Infinity Gauntlet/War/Crusade. The times he appeared in Silver Surfer. Warlock and the Infinity Watch. The most recent, and good, Thanos related thing I can think of is Marvel Universe: The End, but you need some general knowledge of Marvel/Thanos/Warlock first. After that give the DnA GotG run and the Annihilation stuff a read.