I'd probably dig a bed parallel to both fences and do mixed plantings, including flowering vines.

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If interested, a small pond would be nice (didn’t know if you were only interested in plants).

Add boulders into a mix of perennials.

Start with a gold-leafed shrub to provide contrast to the tree.

Some option

A small tree or large bush will take the focus away from the mis-matched fencing, and won’t require the maintenance of a flower bed. This is a Crepe Myrtle, but you should get whatever grows well in your zone.

or

Trim the shrub, place a birdbath in front of the shrub. Outline the area next to

the grass with large rocks. Fill in bare area with annuals: Impatiens might work.

Thanks for your suggestions everyone! The consensus seems to be make it focal point with a shrub or bird pond/fountain. I was thinking a seating area, what do you think?

Seating areas are also focal points.

It's hard to tell what's your shrub and what's the tree. Looks like there's a lot of shade and your shrub is sorry for it. But, it might be something lovely, just not in bloom right now.

Here are a few ideas:

If you post close ups of the shrub we can probably tell you what it is.

Regarding your seating area question, you’ll still have to improve landscaping. Also consider what would draw you there, especially if you have a patio/deck next to house.