There are very strong comparisons to Noah, Daniel, and Job. They were men, who for their integrity, were delivered from the ruin that befell others. But you make a valid point, why would Daniel, a supposed contemporary of Ezekiel, be classed with the other two? Daniel 2 shows that Daniel was well known and considered remarkable by more than just the Jews. Ezekiel would have given life to his illustration by including a modern example among Noah and Job. I did not notice, in the text, that Daniel is noted for saving his own sons and daughters...
Barnes commentary brings out that " There is in the order in which the names occur a kind of climax. Noah did not rescue the guilty world, but did carry forth with him his wife, sons, and sons' wives. Daniel raised only a few, but he did raise three of his countrymen with him to honor. To Job was spared neither son nor daughter."
Clarke brings out: " Noah, though a righteous man, could not by his intercession preserve the old world from being drowned. Job, though a righteous man, could not preserve his children from being killed by the fall of their house. Daniel, though a righteous man, could not prevent the captivity of his country."
So just because Daniel is mentioned with Noah and Job, does not mean that this was necessarily referring to an earlier Daniel (though I don't rule that out completely). As far as the biblical text itself goes, there isn't any reason to think it refers to anyone BUT the contemporary to Ezekiel.
At the time of Ezekiels writing, Daniel would have been in captivity for 14 years and would have been very well known to captive Jews.