The figure of speech used in the lines from sonnet 10 might be personification, in this case, of the word Death. It might be said that personification is the figure of speech in which something nonhuman is given human characteristics. So the "Death" is firstly, personified by introducing it in capital letters, which means it is used as a name, a proper name. then it is given human characteristics, like "proud" "mighty" and "dreadful"
I believe it would be the poet
Poe creates contrast in his portrayal of the bird in "The Raven" by placing the black bird on the marble statue. The contrast between the darkness of the bird and the whiteness of the statue is quite striking, exactly the thing he wanted to achieve.
The Vice President, Andrew Johnson, Secretary of State William H. Seward, and General Ulysses S. Grant.
-Hopefully this is correct if it is let me know !!