I'm not sure what you mean by 'drained,' but if you mean pressed so that lot of water is removed (wrap in a cotton dishtowel, place on a plate, and put another plate on top, with a weight---like a heavy pot--on top and leave for about 20 minutes), then it should be dense enough (just be sure to use water-packed tofu, and not asceptically packed tofu, which doesn't have the same texture)
Another option, which would taste more chickeny, would be tempeh.