Well, I think it's hard to know whether the room will be overly crowded or cluttered without knowing the size of the room or seeing a picture, but to me, and this may be just my own opinion, but I think if you have a coffee table and an ottoman in the same room, the coffee table should be larger than the ottoman. Does that make sense to anyone else but me? Also, I just wonder if you even need a coffee table with such a big ottoman. You could put a tray on top of the ottoman and still have room for feet!

Hard to say without a picture of the space and a rough layout idea. I could see it if the space was large enough to support 2 seating groups. Both being used in a single group may look awkward.

I agree with sue. We have actually have 2 ottomans and one foot stool in our family room. The larger ottoman is more centered in the room and is used as a coffee table, has a tray to put things on. If your room is large enough it can work.

"Is it possible to use both without the living room looking overly cluttered?"

Sure... it's possible!

But there is no way of knowing if it will work in YOUR particular room without seeing the room.

It's very large so it could be used to divide a room or in place of a loveseat in a seating grouping. I do not think it would be wildly successful placed right next to or in front of a sofa.