As a final comment on this issue, I personally suggest that you remove Alignments from the game altogether and have your players create personalities instead. There are no Paladins on Mystara. If you want to use them, I recommend that you create individual kits for followers of the various Immortals. Alternately you can have fighter PCs given certain abilities if the chose to devote their lives to an Immortal. In the known World they are usually only found near elven settlements in Thyatis.
Foresters are humans who seek to learn the elven ways.
Consider giving Rangers spells from the selection of the Elven Sorcerer kit, mentioned later in this article. Shawn Stanley has more info on the what benefits each religion has on his Homepage. There are no Druids in the Known World. There are druids in Robrenn on the Savage coast and there might be druids in the Hollow World. There are no such on Mystara.