Lots to consider. I’d take a picture, decide on budget and head to a nursery. We did this (during a slow period) and they showed options: how garden will feel short and long term, recommendations based on soil and sun exposure, various heights, green tones and perennial and annual inclusions. They will also recommend what to trim or remove to make way for improvements.

You have a nice selection of shrubs, though some might be planted a bit too closely. Maureen gave you some really good advice. You need an experienced garden person to look at photos and make some recommendations. If you’re not experienced in pruning, ask the folks at the nursery to recommend someone. It’s not a difficult task if you know what you’re doing. With a little tidying, that border is really going to complement your lovely home.

It depends on where you live. IMO you have too many foundation plants meaning shrubs. They should cover 30% of your design. I prefer the Roy Diblik and Piet Oudolf garden designers. They plant in succession so that something is always in bloom, and changing, plus winter interest. Also please add native plants to your design!

That is how I usually design foundation plantings so that you have color in all seasons . I think what you have needs a bit of a clean up so pruning some of those shrubs can help to open it up a bit and I love bulbs for ease of care and those pops of color and you can put them in the spaces after you prune. I do not add native plnats to this type of landscaping they tend to take over . Can you post a pic of the whole front of the house that can be very helpful

Here are some ideas that you could do on a smaller scale depending upon region. I agree with Patricia except on the native plant issue. Some are clumping, and do not take over. For example, prairie drop seed here in the Midwest is an excellent foundation grass and is clump forming and native. One just has to as Piet Oudolf says, “Know your plants.”