I have not ridden the Tiger or Multi.
I have owned and ridden R1200GS and love it. Rode it across outback Australia with no bother, properly flipped it a couple of times and just picked it up and kept going. I buy the hoopla about BMW's reliability. The GS is as at home on the road as it is off.
I note your list is geared towards multi-terrain bikes. Are you planning on off road riding or have you chosen this class and frame geometry for another reason? If you are not planning on off road, can I recommend you consider the K1300S, like other members on this thread? I owned and rode that in Europe and it toured like a dream. Loads of power. Great design and aerodynamics - very little buffeting at speed equals low stress over long distances.
I found an indicated 280kph on my earlier stock K1200S (with panniers!) with a little extra room in top gear before I ran out of road. On my stock K1300S I found an indicated 290 kph.
The K is better at commuting than a multiterrain bike, in my view. Multiterrain bikes are too wide for city traffic and unless you are enjoying those big front forks off road somewhere, all they do on road is make things squishier and add fork dive when braking. The K is narrower, and if you really want, the mirrors fold in like the Pani, for filtering in traffic. Very steady power curve in city traffic - so you have lots of control, and no champing at the bit. Also the BMW ABS is excellent, I was a regular user whilst commuting if someone cut me up. Oh and don't forget those heated handgrips. Call me a pussy, but on a chilly winter's day nothing beats 'em!
Take one for a test before you make the call
Have fun choosing. Keep us posted.