No on the sectional. Couches give you the best design options.

2 sofas and 2 chairs I think would fit.

I would do 2 sofas, 2 chairs and turn the rug --no sectional.

Also, I recently purchased the Caitlin Chair by Everygirl from Interior Define and have to say that I am overly impressed with their furniture quality, comfort, style and service. Highly recommend! Although, I don't know the Sloan series personally, so if you purchase and hate it they have free returns if you donate the item to your local Goodwill (non-profit).

Hope this helps!

Here is how I would set up your space. Make sure the chairs are not protruding into your walkway to the door. Openings for you to enter your arrangement can change, based upon your wants/needs. Here I show a space between the chairs. You might like it differently. Make sure you map out an accurate floor plan before purchasing anything. The sofa you have now appears to be too long for the arrangement I am showing.

Sectional: most adult guests do not like to sit on a sectional. It is also not very versatile for future changes. If you do not have guests often and that is not as issue for you, a sectional is ideal for this arrangement.

I like the Tyson best for you. I see your dining chairs have a mcm vibe to them with the angled legs. You can add that look on other items. Soon, that look will fade, like all other trends. So, be careful about adding too much.