MasteR
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The fact that Yashur was in the block on the first night speaks in his favor. And if on the first night he went to kill Balzac instead of Grande, and this night the murder of Balzac occurred (even if it was a stolen kill), then the clue pointing to Yashur is incorrect. If, however, Grande was killed on the first night, or this night, then I'm ready to vote based on my deduction. I haven't found any other plausible options yet.
And one more thing. Since a stolen Night Detective (ND) is displayed the same way, it's theoretically possible that Medj could be Balzac, who killed someone on the first night and was in the block this night, while the murderer killed him with a stolen ND. This possibility cannot be ruled out.