First, you need to tell us your items.
Second, there's no good team for "overall Pokemon". We give very different advice for different formats. If you want to play multiple formats, ask multiple questions with a copy of this team in each.
Third, if you don't know what EVs your Pokemon currently have, tell us what EVs you want on them. After deciding on EV spreads, you can reset your Pokemons' EVs with berries or super training and then EV train your Pokemon.