Consider, 

***big name***

> A recognized leader in a particular field.

> [Random House Kennerman Webster's College Dictionary](http://www.thefreedictionary.com/big+name)

> *Grumman Aircraft Engineering Corp., which used to be the big name in this field, has stopped making this type of plane for the commercial market, now produces only for the government.)*

> [Business Week](https://books.google.fr/books?id=XZsiAQAAMAAJ&q=%22used+to+be+the+big+name+in%22&dq=%22used+to+be+the+big+name+in%22&hl=fr&sa=X&ved=0ahUKEwi3vODc77_LAhUFOJoKHcZGC78Q6AEIHTAA)

***flagship***

> : the best, largest, or most important one of a group of things (such as products, stores, etc.)

> [Merriam-Webster](http://www.merriam-webster.com/dictionary/flagship)

> *Photoshop used to be the flagship of this company.* [Photoshop Family](https://feedback.photoshop.com/photoshop_family/topics/switching_tabs_in_wrong_order_shortcut_roundabout)

> *Cadillac's newest flagship was revealed tonight in New York.* 
[The Coolist](http://www.thecoolist.com/tag/cadillac/)