The first one looks like it'll make your butt and back hurt on rides more than 8km or so. that's just my experience, I'm neither a bike expert nor a body expert. Same with 5.

The second is a beauty. It should be good for most commutes imo. But lack of gears will make things harder if you travel near beaches east or hilly Scarborough. You'll get used to the not-so-upright position.

Third looks good overall. I use the tire Kenda Kwest on my mountain bike for commute. They're great and can handle gravel and all kinds of things thrown at it. Speaking of which, I'm selling that mtb with road tires I just mentioned for cheap, you may like it for the extra suspension.

I agree with your friend that 4 and 5 looks great. I'd probably go with 4 if i were you. The fat tires may slow you down but will give you comfort.