Let's start with what style you like, or maybe another room in the house we can kind of help understand more.

For the entry, I might go with a semi-flush light so it could be a little larger in scale but not hang too low. for the rug, I would go with like a 4x6 or 5x7 maybe even round. so it fills the area a bit more and helps balance in with the staircase. I would probably put a rubber matt for shoes by the floor heater to help dry them and to keep them warm :) doesn't seem to be too much space for a table here but finding a little half-round or small side table to put by the door for keys and mail could work. This is basically just to give you an example ...

That looks great!