N2, not sure where the pot is? Reason for picking this is that it's a single plant. You still have space for your stuff on the bottom shelf, and it seems more open to whatever variation in growth the plant actually takes.

The others with multiple pots either take too much space from the shelf, or even worse, they connect multiple shelves. These are vines, potus is easier but ivy will surely get tangled with one another and the day you need to move one plant out of the way for whatever reason, you risk pulling all others away with it and make a mess (possibly also harm the plant). Similar scenario if you are ever clumsy reaching for a book or something on the shelves.

I can suggest other potted plants for the shelves, I've seen ribbon plant do very well and you can also try potus, but I'd recommend a single creeper for the empty wall space.