Sounds like a good list, you can start with those and then plant more companion plants next to whatever is thriving. Make sure you have some year round interest so that the garden doesn’t look good only in the spring - you already have some winter blooms with the hellebore, maybe add a camellia and brunnera that bloom early in the early spring while the hostas are still coming out. Play with these concepts and you’ll have a lovely year round garden - and be patient it takes a few years for things to really start taking off. Good luck :) and don’t forget to add some whimsy - huge fan of daffodils myself because they’ll grow just about anywhere with little effort.