For 'most chores' on elk, I think you'd be OK with those bullets if you wait for the behind-the-shoulder shot. Elk are tough animals and I like to hedge my bets a bit more and usually consider a well-constructed 180 gr as a better choice. The only exception is the 165 Failsafe, which isn't made any more, but maybe can still be found. A Swift A-frame or Barnes TSX in 165 would also likely be quite suitable. I don't personally have experience with the bullets you listed, nor what I've listed (I usually use a 338 WM on elk) although my brother has plugged a couple elk with the 165 Failsafes in the 30-06.
A lot of calibers and bullet weights will work. I've shot a couple cow elk with a 6.5-06 with 140 gr Nosler partitions and they died just fine, but that caliber and weight has a good sectional density, and a good reputation. With elk, stout bullet construction, and good sectional density are what I use to guide my choices.