If you are looking for something similtar to MEW, I suggest you Coinbin[1], which is open source, don't require any internet connection and can be used from any PC if you have the email and password chosen when generating the wallet.
[1] https://coinb.in/#wallet
That looks like a very useful tool. Is there any advantage in generating a SegWit address over a regular one? I am making a paper wallet for someone else to store funds so I want to make sure they can access them later in the future. I know for cold storage paper wallets I should just need an address and private key right?
what would an investor know about the technical side of cryptos ? 
I think it is very important to understand anything you are invested in, personally or financially. I find technology in general fascinating, I always like to learn more if possible. In a way, learning is the purpose of life.