Landscape designer Mandeville

Over the years I've torn up quite a bit of the original landscaping in my front yard and replaced with plants I liked or thought would do well. Some have taken off and some have not done so well. Now I have a mix of stuff that looks good and some stuff that looks terrible. Just recently I've ripped out some african irises as they became overtaken by weeds and other grasses not to mention they always die-back in the winter and now I have a large empty bed. Instead of just replacing plants in that one bed, I'm ready to come up with a cohesive plan and I'm looking for someone to generate an overall design instead of just planting what I think looks good now. I want something that will look good today and improve over the next 5-10 years. I'll buy the plants and do the work, I'm just looking for someone to generate a design. Any recommendations?