heavy-hitter

listen to the pronunciation of heavy-hitter
English - Turkish
ağır hitter
English - English
an influential person who works hard to promote the causes they are interested in
boss, person of authority, one who carries a lot of weight
bigwig", important or influential person; baseball player who hits many doubles or triples (Sports)
Slang term for any person with substantial resources
A distributor who is very successful at producing large volume sales and who has a large following among other distributors
A real estate developer or investor who has substantial financial resources and or financial backing
One that is predominant, as in influence or power: "Especially when a candidate is a challenger, appearances with heavy hitters from the party lend an air of credibility" (Linda Feldmann)