The best replacement for tomato soup is tomato bisque.

The best alternatives to tomato soup are rated as following:
★★★★★  tomato bisque
★★★★  tomato sauce
★★★  tomato juice
★★  tomato paste
★  bisque
★  tomato soup
★  canned tomato soup

Your alternative for tomato soup is not listed? Suggest!
Speaking about tomato soup, one probably shouldn't forget about carrots.

Other search terms related to tomato soup and their ratings are:
★★★★★ carrots
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tomato soup
tomato bisque
tomato sauce