comer — You can use comers to refer to people who arrive at a particular place.
presence — the state or fact of being present, as with others or in a place.
spark plug — a device designed to fit in each cylinder of a gasoline-powered internal-combustion engine and to produce the electric spark for igniting the mixture of gasoline and air.
upstart — a person who has risen suddenly from a humble position to wealth, power, or a position of consequence.
whip — to beat with a strap, lash, rod, or the like, especially by way of punishment or chastisement; flog; thrash: Criminals used to be whipped for minor offenses.
heavy hitter — a baseball player who makes many extra-base hits.
achiever — A high achiever is someone who is successful in their studies or their work, usually as a result of their efforts. A low achiever is someone who achieves less than those around them.
pathfinder — a historical novel (1840) by James Fenimore Cooper.
trailblazer — a person who blazes a trail for others to follow through unsettled country or wilderness; pathfinder.
up-and-comer — likely to succeed; bright and industrious: an up-and-coming young executive.
vip — A VIP is someone who is given better treatment than ordinary people because they are famous, influential, or important. VIP is an abbreviation for 'very important person'.
catalyst — You can describe a person or thing that causes a change or event to happen as a catalyst.
doer — a person or thing that does something, especially a person who gets things done with vigor and efficiency.
generator — a machine that converts one form of energy into another, especially mechanical energy into electrical energy, as a dynamo, or electrical energy into sound, as an acoustic generator.