Welcome to the forum
Piggies are little food processors so being greedy is natural behaviour.
As @Bill & Ted said he can have a cuddle to let the others eat.
You can also make sure that you have at least 2 bowls, several piles of hay, scatter veggies around which will give the others a chance.
Have a browse through the forum behaviour threads - they will help you to understand why piggies behave as they do.
Please can we see pictures