Flowers...

We purchased an old 1800 home, moved in this January after a long 4 months constructions and has 3 acres that came with it and when we took out all the leaves last month we found a lots of flowers growing but it's every where and some I am not even sure what they are! We have Stella De Oro- Lily, Siberian Iris, tulips, Daylilies, Snow ball bush, Red Barberry shrub and Rose of Sharon will be plant next weekend; oh and a Hibiscus perennial. My question is… because those plants are every where in the back yard (it look like a abandon old nursery) I will have to put them together and need to put some at the front of the house in a long/large flower bed (Full sun and afternoon sun also) but not sure the good combinations and I will have to buy new ones also for the front but looking for ideas of perennials or annuals. Any one here is good with plants; I am open to any suggestions!