Here are some suggestions to get you started.
Black Valentine, Dragon's Tongue and Royal
Burgandy are delicious and produce high yields.
The Albino Beet is very sweet and you don't have to worry about staining.
Yellow Detroit has colourful bright green leaves and yellow stems.
Chantenay is a delicious bright orange carrot that
grows and stores well.
Scarlet Nantes is one of the best carrots for juicing.