“研究生英语开创者”这个短语中，“开创者”可以用“ 创立者”或“ 奠基人”来表达。例如：

1. He is considered the founder of graduate English studies in our university.

2. She played a key role in laying the foundation for graduate English education.

这些表达都准确地传达了“开创者”或“奠基人”的意思，适用于描述在研究生英语教育领域做出重要贡献的人。