Technically, it would be from 40k. "In the grim, dark future of the 41st millennium, there is only war" it says on the side of my 2nd edition box set.
Interesting that you do like 40k but not fantasy if you're put off by the grimness. I don't know if the presentation evolved later, but when I was big into Warhammer as a kid, the fantasy stuff was usually much more light-hearted than 40k. 40k is nothing but unrelenting horror, misery and suffering for everyone, all the time. There are no heroes. The Imperium is a monstrous regime based on extremist, unreasoning religious fundamentalism, and the brutal suppression of all dissent with no concern for collateral damage. And most of their opponents are worse.
Don't get me wrong, I love 40k. I'm just a bit baffled that someone turned off by grimdark likes the game in which there is no time for peace, no respite, no forgiveness. There is only war.