Yes it's possible, but it would be rare. Windu invented Vaapad, a variation of Juyo and later taught it to his apprentice Depa Billaba. The challenge is fighting that ferociously without giving into hate. Windu did that successfully, but few others could use the form without veering towards the Dark Side.

Yes a Jedi can use juyo as their fighting style. Though according to the Jedi path only a small number of students are formally trained each year due to the emotional demands. It takes a very disciplined and mentally strong individual to handle it.

That being said Rahm Kota, Depa Billaba, and Mace Windu are all confirmed to be Juyo specialist according as far as Legends is concerned.

Juyo was used as a main style by Jedi during the old republic and was practiced as a side style by a few jedi after its banning. Personally, I feel that Juyo could always be used by Jedi, but just can’t be mastered by them.

Some Juyo using Jedi are : Atris, Rahm Kota, Mace Windu, Depa Biliba, Cin dralig, Jax Pavan.

It's likely many NJO Jedi used it as well especially since any battlemaster has to have known it.

It's not impossible and honestly, people seem to forget that the Passage in the Jedi Path was written by Skarch Vaunk, who at the time was a Jedi Battlemaster coming off of the New Sith Wars and just before the Ruusan Reformation.

So it's not entirely accurate to say that Juyo was restricted from the whole Order, Vaunk only selected a handful of candidates at the time, that doesn't mean this was standard practice later on.

In fact Jax noted that he was trained through all the lightsaber forms, including Juyo from what I recall, although according to Jedi v Sith, Cin Drallig notes that this form requires a high level of mastery of multiple forms in order to successfully use it.

So it's not that a Jedi can't use Juyo, it's more the fact that one already has to be a master of other forms to use it, as well as controlling one's emotions.

Yes, a Jedi could. Windu created his own variation requiring the user to fight so viciously without actually giving into your hate and anger, you need to be able to accept your inner darkness, but be disciplined enough to never let it overpower you. So yes, a Jedi that has enough control over themselves could use Juyo/Vapaad, but it is rare to find anyone that is, and most who try eventually give into the Dark Side, which is why someone like Master Windu is such a rare sight.

I wonder Revan is mentioned to be very good in Niman but how about Juyo.