From reading your likes and dislikes it sounds to me that you need to walk in the south of the UK, Kent, Surrey, East and West Sussex and Hampshire, their landscapes seem to fit your criteria.
So as a suggestion how about linking, with train stations at the beginning and end, The North Downs Way, West to East, The Greensand Way, East to West, The High Weald Trail, West to East and ending with the Sussex Border Path, East to West, finishing at Emsworth on the South Coast? A long zig-zag walk, about 400 miles or so, (could be more) all waymarked and ending on the south coast.
Everything you've identified on your list is in all of these walks.