OOC
Quick explanation for each one because they're all really good!
Saber Marionette J is a relatively old one (airing in the late 90s). In humans essentially land on and colonize an uninhabited world. However, only men end up on this world... So after hundreds of years of human cloning everyone is living on a planet entirely inhabited by men.
Monster is a good psychological horror manga, again, a pretty old one (One of my personal favorites). It's about a brain surgeon in post WWII Germany who saves the life of the wrong patient. It's REALLY exciting, and I'd recommend checking it out if it sounds interesting.
Code Geass is a newer one than the other two, but is more popular than the other two. It has a confusing plot that is explained better in the show, but the characters are memorable and believable. It's pretty popular because of that. Pretty soon, apparently, it will be getting a new season despite it having an amazing ending.
Recently, I haven't had time to watch anime. But, those would fit the mood and setting pretty well.
Don't worry, no one has to change anything. We'll probably drop the third genre all together in the end because we can't agree. Unless you guys decide together on the last genre. At which point I'll be happy to change it!