An entryway console is the first surface anyone sees, which is exactly why it's the easiest one to overload. A few things that tend to work:
Start with one anchor
Pick the tallest or most sculptural piece first - a vase, a candlestick, a framed print leaned rather than hung - and place it off-centre, not in the middle. Everything else gets arranged around it, not next to it as an equal.
Vary the height, not the number of objects
Three pieces at three different heights read as considered. Three pieces at the same height read as a display shelf. A low bowl, a mid-height candle holder, a tall vase - that kind of spread does more work than adding a fourth object.
Leave the negative space alone
A console with visible surface around each object looks more expensive than one that's full. If it's tempting to add one more thing to fill a gap, that gap is probably doing its job.
Let one material repeat, not all of them
Pairing glass with ceramic works. Pairing glass, ceramic, resin, wood and stone all on one console usually doesn't - pick two materials for a given surface and let the third one show up somewhere else in the room.
Our own take on entryway pieces is in Shop by Room: Entryway.