I respect the opinions of people who oppose the BS/Ganondorf idea because I think they have valid reasons, but I have to disagree with you on that second paragraph. The image of Ganondorf being a brawler and using his fists doesn't come from Zelda, it comes from Smash.
In Ocarina of Time, he was very magic-oriented in his Ganondorf form and used twin swords as Ganon. In Wind Waker, he used twin swords as Ganondorf and fought magically via his puppets. In Twilight Princess, he did indeed use his Beast Ganon form very physically (albeit with teleporting magic being a very major part), which is represented well in his Final Smash. However, he fought magically (and with a sword) while possessing Zelda, and afterwards, he again fought with a sword (with a couple of flips and physical strikes, but mostly with his sword). Even in the original Zelda, A Link to the Past, and Four Swords Adventures, his beast form used magic and his Trident. And again, in A Link Between Worlds, Yuga Ganon uses his trident and magic. Even all of the forms of Phantom Ganon use magic and weapons and not their fists to fight.
So, again, I respect the opinions of those opposing the ideas and I won't argue about that, but you're wrong if you think Canondorf is a brawler like he is in Smash.
Well then, I guess it's not much of a surprise that I think I'm not wrong. Here's why:
OoT: Ganondorf opens with some sort of magically imbued punch (which can be likened to his current fair), which causes the floor to collapse. This is the first combat maneuver we've ever seen him perform. So a decent start. His other abilities are represented by two different magical attacks and a transformation into an uncontrollable beast that shows no semblance of magical ability and uses swords that would be unimplementable on any Smash version of Ganon.
Wind Waker: Cutscene before the final battle, Ganondorf attacks Link with a series of powerful punches. He also knocks Zelda out with a single backhand. His sword techniques are also rather limited, even compared to the number of recognizable unarmed attacks he uses throughout the series. Again, all aspects of magic used by Ganondorf in this game are less direct-combat-oriented, and would translate poorly to any Smash Ganon, brawler or not.
Twilight Princess: He kills a sage with his bare hands, while impaled with a conveniently reachable sword. Also, I already went over the elbow and kick attacks. Seems pretty brawlerish to me, to kick your opponent's shield out of the way in a swordfight because the sword just isn't cutting it (pun intended). Using a sword as Zelda is akin to picking up the nearest weapon to fight, since Zelda's body is hardly fit to perform the same feats of strength that Ganondorf's could.
Everything else tends to fall under Trident Ganon or assorted alternate forms, which would be difficult enough so that it probably wouldn't be implemented on a new Ganon anyways (Fire keese and his boomerang trident, maybe? Why use either over the Volleyball of Doom? You'll have to bring something up if I've missed it).
I think you're looking at my argument the wrong way. I'm simply saying that physical attacks are very much supported by Zelda canon, as I've discussed, and thus, I don't get why the idea seems to be that they have no place in his moveset. I never said Ganon had to be a brawler always, exclusively, and forever. I wouldn't make a single negative comment if Ganon were given a few "more canon" moves, but I certainly frown at the idea of bringing in Black Shadow to do the job.