I go to open houses and look at model homes all the time (for fun and free design ideas) I’ve seen this quite a bit and I love it: a slim table Like This with a big mirror hung over the table. You can put a bowl of fruit, or a bowl of ornaments or a flower vase or some framed photos on the table.
Or they could do something like This with a unique looking chair, some artwork and either a candle stick like they’ve used in this picture, or even a hat rack or a decorative light fixture.
If the space is big enough they could even put a bench style seat in there, with some artwork above it Like This
Here’s a neat looking slim cabinet with drawers that not only looks good, is very functional Here and it has a lovely mirror over it.
They might also want to paint one wall with a rich accent color that complements the color in the rest of the living room or whatever room the foyer opens into. Like This
I also second @YARNLADY‘s idea of having a chandelier. I like This One and This One or This One