I understand your thought process. Personally, I never wanted to get so large that I still couldn't run a fast mile. That attitude does not appeal to those more focused on Powerlifting, but to each his own.
Here is a good test of strength and fitness:
- Clean and Press-
This gives you elements of the Deadlift as you have to rip the weight off the floor. But it also includes overhead pressing strength. This can be done with your body weight on the bar for reps, or for one rep. It depends on what you are after.
This is another movement which includes many muscles directly and several supporting muscles as well. Also, it's almost immpossible to be in lousy condition and be able to perform 20+ reps.
- 1/4 Mile Sprint-
While the one mile run is a great test of fitness it might not be necessary. I have found that I can pretty much tell what a person can run one mile in after I test them in the quarter mile (or 400 meter). Warm-up first, then go one time as fast as possible.
If I had to add one more movement it would be the Barbell Squat. Put your bodyweigt on the bar and see how many reps you can do without stopping. It can get very nasty.
Okay...what do you think?