Laxus vs Orga vs Jura
Personally I think Orga will fall first. Why do I say that? To me Orga may look intimidating but when matched with a little stronger opponent he gets scared.
For example when Jura arrives:
For a big buff guy that's a LG Slayer and also in the Sabertooth Guild, which is said to be the strongest guild.....for now , I suspected him to be excited and little cocky, but nope he is scared. He has may have chance against Laxus since he is not a true dragon slayer, but against Jura who intimidates him, he could start losing confidence in winning.
Laxus keeps his cool and is confident. He has enough magic to use Fairy Law, his lightning ability is really powerful and well if Natsu could beat a Wizard Saint (Jellal) and a FG Slayer (Zancrow) then why can't Laxus.
Jura, this guy, back in the Oracion Seis arc he seemed pretty weak. But since the time skip he has the advantage (then again Orga can have an advantage too against Laxus and Jura). I mean Jura is a wizard saint, but Orga was part of the five that made Sabertooth the strongest guild. Now back to Jura, his special is manipulating the earth around him, and since the time skip he has improved a lot. Basically the whole area is his playground, he has the biggest advantage.
So yeah who do you think would win.