This Seed contains all biomes within a 2000 block radius starting from [0,0]. It is very rare to find ‘em all within this radius. I used a batch script to find it.
Pros:
 

• All biomes within 2000 blocks
• 3 huge savannah plateau M biomes
• Massive mesa area with wonderful bryce spot
• One of the largest birch forest M biomes (large birchs) i’ve ever seen, next to mesa bryce
• Also lot of standard birch forests all connected north east of mesa bryce
• Massive jungle in the east with huge roofed forest inside
• South east: mega taiga und mega spruce taiga
• North: ice land with spikes biome
• NO swamplands in between exept the islands north east (i hate swamps!)
• Mushroom biome!
• There’s even room for a massive lake/ocean with a lot if islands in it

Seed ID: Minecraft 1.7.8 Seeds