Here's two:

1. mL0VRjECfX
5 Biomes - Meadows
- Black Forest
- Swamp
- Mountains
- Plains
3 Bosses - Eikthyr
- Bonemass
- Yagluth
Note 1: Elder one island over to the east
Note 2: Moder 1 island over to the Northwest
Note 3: Trader on same island
2. IVwpUWiiuE (HUGE!)
5 Biomes - Meadows
- Black Forest
- Swamp
- Mountains
- Plains
3 Bosses - Eikthyr
- Moder
- Elder
Note 1: Bonemass one island over to the East & North
Note 2: Yagluth one island over to the East & North
Note 3: Trader one island to the West

Of interest : 3 inland seas although one has 3 rivers connecting it. Do not sail with a
Longship!

enjoy.