The various 7mm magnums can all be wonderfully versatile, but no more so than any number of similar cartridges that are slightly larger or slightly smaller. If versatility is what you crave, handloading provides the real answer, since its you, and not the factory, that controls the throttle. Bullets with .308" and .284" diameters are available in more styles, with a broader range of weights, and with more types of construction, than any others, so you're heading in the right direction with a 7mm.
Now I own rifles in .308, .30/06, and .300 Winchester, and there's nothing that I can do with either the .308 or the .30/06 that I can't do as well with the .300, but if a light rifle is desired, an appropriate piece that chambered in .308 will be easier to find. A .30 caliber 150-165 gr bullet, with a muzzle velocity of 2700 fps or 2600 respectively, from a 20" barrel, shoots flat enough to make longish shots reasonable, and hits hard enough to ethically kill most things we're likely to eat, with the possible exception of bison. For those occasions when you might want or have to shoot something bigger, tougher, or more dangerous, the 150-165 gr bullets should probably be exchanged for a 180-200s.
In 7mm similar options are available, a short action 7-08, a long action .280, a 7 magnum, and it should be noted that various 7-300 magnums like the 7mm Practical are becoming the darlings of long range hunters like Nathan Foster, but his rifles typically weigh 10 pounds If you are tempted by the WSMs, but intend to load long, heavy for caliber bullets, a long action rifle has some advantage since you can seat the bullet longer so the shank doesn't intrude upon the cartridge's powder capacity. Finding a long action WSM light enough to suit you may present a challenge, but the short action has of no disadvantage when loading 160 gr lead core game bullets, short enough to cycle through the magazine. Bullet weights would typically be 140-160 grs for general duty, 175 gr for big stuff, while 195 gr needles are available for long range work, if your rate of twist is quick enough to stabilize them.