Like in movies , there is always one main Hero and than a sub hero , your outfit needs to have one Hero. I like to call it a showstopper piece.
Don’t over do the accessories or the makeup or even the colour of your clothes for that matter.
In picture one, when the outfit is so glamorous, its important to let it be the hero and keep all other elements simple
In the denim and top outfit, the mood and message is causal but the neckpiece in the first option is kind of confusing the shoes as well.