Here's a list of winners and runners-up for each year. I'm certain there was a better novel than
They'd Rather Be Right for the 1955 award, but no official runners-up are listed, so I'll limit myself to those from this list.
https://en.wikipedia.org/wiki/Hugo_Award_for_Best_Novel
...
For the period with which I am familiar (1950's-very early 1980's), I have very few disagreements with the winners.
I have a lot more than you, but relatively few for the period I think the awards made sense which is that same period.
Budrys got shafted by Catholics twice.
I'd go with
Who over
A Case of Conscience and
Rogue Moon over
A Canticle for Leibowitz. The first may be an excessive fondness for Budrys but the second I'd stick by anyway.
I'd pick
Nova over
Stand on Zanzibar (boy was that an underwhelming year - could have gone to the un-nominated
Do Androids Dream of Electric Sheep or even Schmitz's
The Demon Breed (or, I hope, Harness'
The Ring of Ritornel, but I haven't read it yet) but
no book sticks out as a "must win an award" book).
I'd go with
Tau Zero over
Ringworld, actually.
Man Plus!
Man Plus! I'd go with any of the other nominees over
Where Late the Sweet Birds Sang (hoping, in the case of
Shadrach, which is also in the Pile) but
Man Plus really should have won. (It did win the Nebula, which is backwards. If
Where Late was going to win anything,
it should have won the Nebula.)
The Faded Sun: Kesrith doesn't stand alone, but I'd still pick it over
Dreamsnake.
I'd pick
Lord Valentine's Castle over
The Snow Queen.
The Robots of Dawn over
Startide Rising. (Surprise, surprise.)
Agreed with
Blood Music over
Ender's Game. (I wouldn't mind something taking
Doomsday Book's place and
Red Mars was the best of the Mars books, but
A Fire Upon the Deep won, which is all I really care about.)
Probably
Marooned in Realtime (maybe
Count Zero - hey, two peas in a pod, so it's hard to decide) over
Speaker for the Dead. (Another underwhelming year.)
And now it becomes pointless to list, because it becomes overwhelmingly common. But, before the Card double-double (they won Nebulas, too) it's something like eight out of twenty-seven, and only a couple of really strong disagreements (
Rogue Moon, Man Plus).
Although I can't detail them all, I will say that, of my post-
Neuromancer disagreements, Worldcon not picking
Queen of Angels over
The Vor Game is the biggest crime of the 1988-2000 conventions, IMO. After 2000 they've all apparently lost their minds and it becomes pointless to contemplate.
(Can mods "dupe" posts? cgsmith's #66 post should probably be copied into a new thread (because it's certainly relevant here but seems to have sparked a lot of specific commentary) and all the posts on it since should probably be split out into that (because they're neat but kind of off-topic).)