if you cant do damage as a mara/sent then it's a L2P issue, i have been queing ranked solo and am not even fully geared and doing either top or very close to top damage every time and can stay alive pretty well. you need to learn when to engage, dont be the first to charge in like a yolo tard, you are not a jugg you cant handle that as a marauder. if they focus you, camo get out of there, let them focus someone else, then come back and lay a beating on them from behind when they start focusing someone else.

Well if we are taking KOTOR1&2 into consideration then Revan with the Star Forge has to be it. I believe they mentioned(i could be mistaken but im pretty confident) that even the emperor feared him and thats why he called him out to the outer rim, and nobody heard from him after that. Can't forget about Darth Nihilus(even though you kill him) but come on the guy had the power to destroy entire planets and almost all of the jedi only using his hunger and power of the force!