I know that Samuel David Luzzatto (1800-1865) said that we served all 400 years in Egypt as opposed to just 210. Are then any other "famous" commentators that say this?
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None that I know of.
Although in Daas Mikra (Shemos, vol. 1 p. 234 n. 85), where they cite Shadal's approach, they mention another interesting one, from Moshe David (Umberto) Cassuto: that the 430 years mentioned in Ex. 12:40 are actually "man-years" calculated along the line from Levi to Aharon. Supposing that Levi was about forty years old when they came down to Egypt [which sounds a little dubious to me - Yosef was 39 at the time, and Levi was a good few years older, so he should have been about 43], and Kehos was 20, then Levi lived there 97 years (out of his 137), Kehos 113 (out of his 133), Amram 137, and Aharon was 83 when they left; 97+113+137+83=430. (The actual number of calendar years would obviously have been a lot less than 430 according to this approach, since there's no reason to assume that any of them were born around the time of their father's death.)