I was wondering if there were any ones that were simple and would benefit elderly/poor sighted people. I have tried launchers but none seem to be that good.
I agree with AlphaTango, a custom ROM won't help you. Samsung Easy Mode is a good choice or using some launchers specifically designed for seniors. Necta, Big or Wiser seem to be very popular.
A mobile app might solve the problem - there are only 6-8 apps on it, and the icons are huge. You only see what you'd need in a car. (If you want something else you have to go to the app drawer.)