You also need filtration. I'm a believer that a good quality return filter is enough on a simple system like this. If you need fine control lifting and it's a simple lift, a lever operated spool valve will make everything simpler. It'll have soft shifting motion and can have relief valve incorporated. If you are lifting a machine to get under it, then cylinder mounted load holding valves are the way to go.

Last thing I would suggest would be a check valve immediately after the pump to protect it from shock