A MIXTURE. There are not many fruits or vegetables that you can eat by themselves constantly that will give you good health. Your body really needs a mixture. The current advice is to eat a rainbow of colours on your plate, so you could have a mixture of green veg (broccoli, cabbage, brussels sprouts, peas, kale, green beans) and orange /yellow veg (carrots, corn) and red veg (beetroot, red cabbage, tomatoes).
We tend to have two different colours of veg on our plates, where possible, for instance, we would not have both peas AND cabbage at the same time, but we might have peas and carrots for the same meal.
Also, choose vegetables that are in season in your country. They are fresher and have not travelled as far. They will be healthier for you.