So I recently downloaded and tried out the Tectonic map generator
I like the way it gets rid of the unnatural usual biomes, and replaces it with something thats more to scale. REAL mountians, real landscapes, endless rainforests... etc. Ores may be hard to come by the ones you need, but when you find them, there's more than you'll use (in real veins of ores), so you better set up transportation infrastructure...
What I don't like is that you take a LONG time to get anywhere, even with fast and fly mode enabled. Its a slower mapgen, too. But it gives a nice sense of scale. The trees are all the right size, too. I reccommend trying it out. Probably not good for your server, Unreal, but maybe another one.