It’s a tricky question, because many people were involved in many aspects of the computer.

It wasn’t a one-man job, just like Oppenheimer didn’t invent the atomic bomb.

Some people argue that some guy called . .. Zuse, Conrad? Maybe? Was the creator of the first working computer, which is about as close you can get to a single answer as to who invented the computer. (Different from created)

His computer, the Z4, was the first commercial computer, before UNIVAC even, but even before that, the Z3 was the the first fully functional, turing complete, programmable machine. He lost most of his work on it during the bombing of Berlin.

The Z2 and Z1 can also be considered computers, but they required programming outside of internal memory, something which we rejected in Babbages machine.