Alder all the way for me if you want great strat tone! Pine can actually be great too like on my Novo strat, but if you want that quintessential strat tone with all the greasiness, glassy, delicate qualities and other stereotypical tonal nuances of the great strat tones we’re used to you can only get it with alder imo. I’ve tried them all for body woods with strats. Alder just really works with those kinda pickups. Basswood imo is awful for reasons others mentioned (sounds weak, soft, flat, lacking frequencies). Ash can be good too, but I’ve personally only really cared for ash on Tele’s. Ash always to me had this weird, kinda bloated quality to the midrange that I never liked. Not nasal or honky, but maybe hollow, I don’t know, I just don’t like it, but for whatever reason it just works great for Tele’s. Maple body strats can be pretty good too like mentioned before, but while I agree brightness isn’t too much with it, I just feel that wood lacks too much tonal complexity to really highlight the 3D nuanced nature of strat pickups at their best