Funnily enough, I've been thinking about something similar for quite a while. This is because I'm a member of a saber combat charter and we fight with full protection. And as nice as this armor is, it's far away from being a Jedi. Unless a Jedi on full plate armor is common, of course.
So I was thinking about a guy with armor, but with a lightsaber too. And if I go back to the armor, I also think of guns, big guns. As a roleplayer (pen&paper) I also have to create a whole character around this idea.
So I ended up with a character inspired by the figure of Baze Malbus from Rogue One. But a little more on the side of the force, maybe. Like a mixing of Baze Malbus and Chirrut Îmwe.
This character should be a former member of the Guardians of the Whills, so he knows the Force, the Jedis and Lightsabers. Secretly trained by a grey Jedi he can fight with a weapon of this kind (as we know it's not necesary to be a Jedi to fight with a lightsaber, just a little bit easier) he don't believe he has special abilities but believes in the Force.
After Order 66 and the rise of the Empire he knows it's not a good Idea to wave around with a lightsaber - Jedi or not. So he has a lightsaber and if needed he can use it, but mostly protected by armor he uses a big gun.
As I say this, I am still at the very beginning of my thoughts. So there is much of work and maybe a lot of changes. But maybe there were also some inspirations?
Just as a reference: