The correct sentence is: Two of the best singers were them. This makes sense because when you rephrase the sentence, "them" becomes "they" which appropriately describes the nouns of the sentence. The modified sentence then becomes: They were the best singers.
The son of Doctor has a paper silhouette in the Youngest Doll.
Answer:
In my preference it doesn't matter how complex your poem sounds,as long as it isn't offensive and is appropriate along with words that can illustrate the topic you are completely fine
Side note: this only applies if your question is generally asking
