Another player who would fit right in toward the top of the St. Louis lineup, Xander Bogaerts is an on-base machine who will cost less than Trea Turner but could have a major impact on the St. Louis Cardinals lineup.
The 29-year old is slashing .309/.380/.456 with 14 HR and 69 RBI for the disappointing Boston Red Sox this season. This mix of on-base skills and extra base hit potential would go great in front of the two-headed monster of Goldschmidt and Arenado, or could provide a protection for the pair in the lineup.
Bogaerts has a good glove as well and would fit in with the defensive minded Cardinals team. He is not going to make the same highlight plays as others, but he he consistent and makes the right play every time.
The nice thing about Bogaerts is that he could cost $50-$100 million less than Turner depending on the amount of years he gets. If St. Louis is looking to make a major upgrade at shortstop long term but would like to avoid breaking the bank, Bogaerts is an excellent option.