Great suggestions from rainbowgardener... I would also add ligustrum to the list. I didn't know what those were, but our builder planted them as foundation plants. At the time I wasn't into gardening and I never watered, fertilized, weeded, or anything. But two years later, those ligustrum were 6 feet tall and absolutely gorgeous! You can prune them once a year to keep them a little more compact, but they look fantastic unpruned. They are evergreen, will hide the area beneath the porch beautifully, and are obviously low-to-no-maintenance.
We have several other foundation plants but the ligustrum are by far my favorite. I recently added three Wine & Roses Weigela, which are absolutely gorgeous. We also have some barberry which rainbow mentioned... love that too, and the colors of those three shrubs play off each other gorgeously. I don't think you can go wrong with any of those.
eta: Skip the Weigela suggestion for the location you're thinking... I just double-checked and it's NOT evergreen. Sorry 'bout that.