I've always enjoyed Simak and his Hugo-winning
Way Station (1963) is one of his best (along with
City (1952)). His books are generally character driven, with the characters being well drawn everymen, warm and sympathetic. The action is subdued - even if great events are occurring, they are met not with screaming and pyrotechnic action sequences, but rather with quiet wonder and acceptance, accompanied by well-modulated philosophical inquiries. As variously noted above, 'pastoral', 'bucolic' and 'Bradbury-esque' are all good ways to describe his books - even when they take place in towns or cities, they are usually small and of limited scope, and the inhabitants are cut from good, honest plain-spun. These two books should be sought out and read by just about everyone.
Also very good are his
The Visitors (1979) and
Project Pope (1981, Hugo nominated).
Other books of his that I've read and enjoyed, but wouldn't rank quite as highly are
Time and Again (1951),
They Walked Like Men (1962),
All the Traps of Earth (collection, 1962),
All Flesh is Grass (1965, Nebula nominated),
Why Call Them Back From Heaven? (1967),
A Choice of Gods (1972),
Mastodonia (1978),
The Fellowship of the Talisman (1978, fantasy),
Special Deliverance (1982),
Where the Evil Dwells (1982, fantasy).
I also found the following to be below average:
Our Children's Children (1974),
Shakespeare's Planet (1976),
Highway of Eternity (1986).
See the unusually detailed Wikipedia
article for more info on these and others.
Lastly, Robert Charles Wilson, especially his earlier books such as
A Bridge of Years (1991) and
The Harvest (1992) really remind me of Simak.