The seed "JMU" on 4k.
The center town in the forest biome has 4 traders on its borders (north/south/east/and west.) Make your base in that town and you will be happy.
The seed "Freeton" produces a fairly flat map of snow in the north, woods in the middle, desert in the south. The center town has 3 traders close together to the north of it and 3 traders to the south of it. Make your base in the center town and you have 6 traders to work with. Attached...