The following are notable contributors in FE method.

Main contributors in the development of FEM

• M J Turner, Boeing
• Ray W Clough, U C Berkley
• John H. Argyris, Imperial
• O. C. Zienkeiwicz, Swansea
• Ivo Babuska
• Thomas J R Hughes, UT Austin
• Tinsley Oden
• Ted Belyschko
• Robert L. Taylor
• J N Reddy

References

• Liu, W.K., Li, S. & Park, H.S. Eighty Years of the Finite Element Method: Birth, Evolution, and Future. Arch Computat Methods Eng 29, 4431–4453 (2022). https://doi.org/10.1007/s11831-022-09740-9
• Clough, R. W. (2004). Early history of the finite element method from the view point of a pioneer. International journal for numerical methods in engineering, 60(1), 283-287. link