Don't think you can limit to 25 or even 50. I'd say the list was intended to hit at least one peak in every state other than RI. As nice as Bear is in CT, in that area, I prefer Race in MA & Brace in NY both on the South Taconic plateau with Bear. (the "New England" criteria takes Brace off, although you start in New England easily enough & go over Round, Frissell, see CT's actual highpoint, the tri-state marker & then Brace.)
Washington? If you ding Greylock for having a road, doesn't Washington get dinged too? The ravines and views going up may be nicer.... (Like Gothics in NY, does your scenic view in NH have to include Washington which you can't see from Washington, unless doing Monroe or Jeffereson with it, or both)
Greylock allows for views of many ranges, a big steep drop into Adams on one side, windmills looking in two different directions (which some of us don't like but other's would find neat, I've been up twice this fall with kids & they and their families found them neat, they may not buy a WMG, but would be more prone to buy a 50 hikes book)
For one's you missed & other comments:
South Turner, seeing Moose in Sandy Stream Pond is almost a guarentee, and the view of Katahdin's bowls from the summit area is incredible. The view from any peak on the Brother's loop is amazing too, South Brother & Coe may be even be nicer than North Brother. (is there a bad view in Baxter? - other than the line at the gate if you are day-hiking....)
Monadnock on a clear winter day allows you to see see snow covered whites in the distance, so it's probably a runner up
Was Kearsarge North on your list?
On my list Saddleback (ME) would be higher than Bigelow
Were any of the Mahoosuc's included?
When there is snow on Carter Dome, you get to look over some of those short trees.
Maybe in order to get more in you do a 50 list & then a top 20 short hike list & then on the short hike list put ones like Willard, Bear, Monadnock, Tom (MA), Middle Sugarloaf, Black Cap (or Bald Cap, near Cranmore), Potash & then include just the trip to Zealand Falls hut & Wachusett on teh short list. (Then you'd have room for Moriah from Stony Brook with or without Sherbourne Moriah on the big list)