Why do you need Floorstanding? It's just the design.
Your room is not large enough to accommodate such a design, so go with bookshelf speakers.
I've linked you a lot of good designs, and the vast majority were bookshelf. This isn't to say that bookshelf > Floorstanding, no, it's that you can get good performance out of both types of speakers. I really only like Floorstanding purely for the aesethetic. A good bookshelf sized speaker is far more practical. My Floorstanding speakers are being sold for DIY bookshelf speakers to save space and increase performance vastly. So my fronts will now take 1/10th of the space, but be far better than I used to have.
My vote is get decent bookshelf speakers although now that I see your room you really don't even have space for nice sized bookshelf speakers.
You really just have to:
A) Somehow squeeze bookshself speakers into there (seems hard if not impossible as your room looks a LOT smaller than I had anticipated.
B) Use a smaller speaker setup that will not get as loud
C) Get something that will fit your extremely space limited area.
Under C you can either pick a pretty subpar small setup on discount from where you work.
Or, build yourself a speaker designed for smaller areas like the Fusion Quad 4 and far nicer performance.
You could also go with a Soundbar + Surrounds although I'm not a huge fan of a soundbar, in your room it really looks like it makes sense given how little space you seem to have to work with.