Hi,
Well I've mentioned it before, but for those who love the Stainless Steel Rat, this is well in keeping with it, and of the same vintage. Starwell - by Panshin. (and there are two sequels.)
Also as a very light but enjoyable read, with a Christian sort of overtone since the author is a Catholic priest but a lot of humour - The Final Planet by Greeley. (He also wrote Angel Fire which is not sci fi, but also good.)
And I'm going to throw in She by Haggard. Older and definitely Victorian values, but his villainess is the archetypal evil queen and you can't help but be conflicted reading her. There are several sequels as well.
Cheers, Greg.