Examples:

• She’s a heavy hitter in the fashion industry, influencing major trends.
• The company hired a heavy hitter to boost sales and marketing.
• He became a heavy hitter in politics after winning multiple elections.
• The law firm’s new partner is a heavy hitter in corporate law.
• That startup attracted heavy hitters from Silicon Valley as investors.
• In the music world, Beyoncé is undoubtedly a heavy hitter.
• The basketball team signed a heavy hitter to strengthen their roster.
• He’s a heavy hitter in Hollywood, producing blockbuster films.
• The charity event was attended by heavy hitters from various industries.
• She proved herself a heavy hitter in negotiations, securing the best deal.
• I'm pretty sure I'd remember a heavy hitter like yourself.
• Everybody back in that room is a heavy hitter.
• He's a heavy hitter and I could really use the business.