The .45-70 is a very popular choice but it's far from the only one. There's a little bit of everything from mild to wild. You have rifles in that chambering from Marlin as well as their .444 and .450 proprietary chamberings. There's the new .470Turnbull for the big Marlins. There are also late model Winchester 1886's in .45-70 and .45-90. Those guns, along with the Browning `86's also get converted to .475Turnbull, .450Alaskan, .50-110 and .50Alaskan quite often. There's also a new Puma 1886 in .45-70 looming on the horizon. In the late model Winchester 1895 there is the .405WCF, one of my favorites. Plus custom 1895's in .375 and .411Hawk cartridges. In the Winchester 1876 replicas there's the .40-60, .45-60, .45-75 and .50-95. Not to even mention all the pistol cartridge leverguns chambered in everything from .357Mag to .500S&W.
Power is a very subjective thing and I don't worship muzzle energy.