How do I remove wallpaper on drywall?

HELP..! Just bought house and can't seem to remove wallpaper that was put up directly onto the drywall. We have tried, soap/water, 2 different wallpaper removal chemicals, scrapping materials including the one with tiny teeth to poke holes on the wall. We were wondering about texturizing the wallpaper over it, then paint it. Can we do this? OR is there a better way to remove? The wallpaper has been up for 15 years and I must say, it's in great shape, no tears at the ends or anything.