The best card is clearly the Duke Snider / Jackie Robinson Historic Duos insert card. It uses a photograph I have never seen before -- featuring both players crouching with bats at their shoulders and they are nicely framed by a couple of other bats. Check out this card below. Another favorite of mine is the Dustin May base card. This card is unusual in its framing. Using the Rule of Thirds, Topps places the right-handed hurler on the right side -- thereby leaving a giant blank open space to his left. In order to balance out this placement the bright lights of the stadium is seen on the top left -- causing a nice contract between light and dark. The artistic quality of this photo is something you rarely see on cardboard.
Lastly, I decided to include the cards made for Hyun-Jin Ryu and Mookie Betts -- even though they represent other teams on the card.
Base
#13 Walker Buehler