There aren't any, they all require some degree of steep climb. Rule of thumb is the more of a zigzag they are the better - if the path goes straight that'll be a hard climb. Those that run at angles are also a little easier.
1. The one at Clayton leading up to Jack and Jill is very steep, I've...
The road to Ditchling from the common has no path and can be a bit hairy in places - Ockley Lane is even worse. There are a number of footpaths in the vicinity that run parallel that would be better.
Check this site Where is the path which has a map next to a satellite view to give you an idea...