1st place: Luke
I mean, that's the obvious choice I guess? The most responsible being of all in the room.
2nd place: Marc
He would just get bored and smoke some hash or do other drugs, but eventually his boredom would be so high that he would just follow the instructions and do the damn thing. Yes, he would STILL outspeed the others.
3rd place: Clemens
He would complain, complain, complain, complain more, maybe do some pushups and dips as a workout, but eventually he would install windows 7, which is the most brainless task of the three. Seeing that he succeeded in such feat, he would go on a roll and just finish the other tasks already.
4th place: Goose
Given the fact that he complains that you have to mess with like, two settings pages on OBS (which are the same shit as Xsplit) and have never tried it, I doubt he would even begin. Even if the room has NOTHING, NOTHING to do, he would still find 1000 other things to occupy himself with, possibly never finishing the task at all, waiting for some timer to end and everyone get out of there, or, if people exited the room as they completed the tasks, he would only do it after Clemens finished. Obviously, complaining about literally everything during the entire process.