Tall Oak Trees and Tall Oak Tree Biome

Placing oak saplings in a 2x2 grid should grow an oak tree that is a little smaller than the big spruce trees. Trees like these exist in the real world, and it would be a simple but fun addition to Minecraft. These trees should also generate in a new biome, the deep forest. These forests should generate with oak trees, birch trees, tall oak trees, and the occasional dark oak tree. Deep forests should only be found within regular forests, much like the Eroded Badlands.