@Darth Thor
For me, it was Maul who always had the edge, excluding their final fight. During TPM Maul was clearly better. In their first remach Maul had some small advantage over Kenobi. Worth of notion is, that Kenobi was terribly beaten shortly before, but I don't think that Maul was in good shape as well, since it was short after he was restored by Talzin.
Another time they met - I believe it was in "The Sith Hunters", wasn't it? - Maul just Force choked Kenobi, when he charged at him.
Fourth time was on Florrum. Kenobi fought Maul on very equal terms, none could find any kind of advantage, until Savage killed Adi and joined, brothers then overhelmed Kenobi and forcedd him to retreat. Shortly later, he fought them again, was Force choked by Maul, severed Savage arm and was Force pushed by Maul. And he kicked Savage's ass during that fight a lot of times... which actualy prove, that Savage was out of his league and Kenobi did a great work. kenobi was unable to gain an advantage over Maul to the very end of that fight.
They also met on Mandalore, after a crush of Kenobi's ship. Maul just came, and Force choked him. But yeah, Kenobi could be injured or exhausted, while Maul was fresh and had some support.
And Grievous is inconsistent even in Legends. He was unable to stomp minor jedi like Flynn Kybo in "Star Wars: General Grievous"; he was stomped by Dooku in training sesion in CW season 2 and by Mace's Force powers in the same source; he also had a hard time against Ventress in their first fight for CIS' army leadership (she overhelmed him a little bit at the end of fight with combination of her skills and Force, but he defeated her due to his enormous physcial advantage) in a comic that was basing on CW. In LoE Dooku confirms Grievous inferiority to jedi Masters of Shaak Ti or Cin Drallig's caliber, let alone Mace, Obi-Wan or Yoda. But..
Grievous managed to defeat both Asajj and Durge in CW comic, defeated a group of jedi Masters, including Ki-Adi and Skaak Ti, stalemated Mace in LoE, defeated Shaak Ti and other masters in CW 2nd season, and did many many more.
In TCW he's inconsistend as well as we all know. Not sure if it's safe to assume, that he would be Savage superior in sabers, even in Legends.