There is no such thing as a "perfect" deer rifle any more than there is a "perfect" elk rifle or a "perfect" rifle for anything else. But there are lots of good choices to fit different situations. All are a compromise in one area or more.
The author, for example, eliminated .30-30 lever guns because of “300 yards of Wyoming prairie”. That’s great if you live in Wyoming or someplace else where 300 yard shots are a possibility, but the vast majority of deer are taken at distances well under 300 yards. A .30-30 will reach out to 200 yards with plenty of authority for deer. My .30-30 handloads push a 170g Speer to 2160fps and faster. Sighted for a Maximum Point Blank Range for a 6” diameter target (the bullet is never more than 3” above or below line of sight), MPBR is 209 yards. At 230 yards the bullet is down less than 6” and still retains 1000fpe. Can you say “dead deer”?
I’m not knocking the 7mm-08 or any other cartridge, but favor the .25’s in a bolt gun deer rifle. My .257 Roberts with a 22” barrel is as good as it gets in a bolt gun. My soon-to-be son-in-law and I both popped clay pigeons at 500 yards with it last weekend. With a 115g TSX pushed to 3013fps using +P data, the energy level at that range is still 1000fpe. While it’s not the rifle I would choose for such long range work on live game, it is quite capable at 400 yards (-14.8”, 1253fpe). My load of choice is a 120g A-Frame at a bit under 2950fps. It will do a deer quite reliably at ranges further than I’ve shot at game in 25 years of hunting Colorado. Don’t think anything bigger is needed. If an occasional elk was on the menu the 7mm-08 is a better choice – but then we’re not talking about the “perfect deer rifle”, we’re talking about a multi-purpose rifle.