Were you “the Rock of Chickamauga”? - Maj. Gen. George H. Thomas of Civil War fame
Were you an admiral who came aboard the USS *Enterprise *but had not a single line of dialogue? - Adm. Thomas, in ST:TNG “The Drumhead”
Did your frenemy refer to you as a “turbulent priest”? - Thomas Becket, as supposedly said by King Henry II; Becket was slain by several of the king’s knights who thought they were doing his bidding
Thomas x3!
DQs:
Greatest fame before 1914?
Product or service named after him?
Wealthy at the time of his death?
Yes (sort of - his greatest fame is probably after his death, actually), yes, and no, which means…
Yes indeed, I am Nikola Tesla. Good work, KO! I was surprised I resisted that long, to be honest - I suppose the nationality and profession kept you guys in the dark for a little while, but once it came down to the wire you were always going to generate the right answer :).