I'm assuming by first person war games, you mean the well-known first person shooters, such as Call of Duty, Battlefield, Arma, etc.
Have you already played the Bethesda Games: Morrowind, Oblivion, Skyrim, Fallout 3, Fallout New Vegas, Fallout 4? These should most likely run on your system, als the last one came out 8 years ago, however they do feature real-time combat.
Other than that, the older Final Fantasy games are now on Steam and should run on your system, such as Final Fantasy X. Depending on the game, they feature turn-based combat, so you can leave at any time, if that is what you meant by synchronous gaming.
There are also the classic more sandbox games, such as Minecraft or Stardew Valley.
Then there is the narrative driven games, such as To the moon.
Most 2d RPGs, such as Bastion, Binding of Isaac, Transistor, etc. should also work on you system, but they almost always feature fast paced combat, which might be too stressful, depending on your definition of too much stress.
For better recommendations on what your system can run, it's probably best to post your Laptop model, or at least the CPU Model, as the first i7s do date back quite a few years ago. Also, as there exists a lot of games, it's helpful to specify a bit more what you're into, such as Open World, Turn-based Combat, etc.