Who else invented electricity except for Nikola Telsa?

Nikola Tesla did not invent electricity. In fact, electricity existed for eons before humans did. It exists today not only as controlled electric current, but as static cling, lightning, and bio-electricity (which powers our nervous systems). To say that anyone invented electricity is the same as saying that someone invented fire, gravity, or light.

However, it would be accurate to say that Tesla was a key figure in generating and harnessing electricity in much the same way as Benjamin Franklin is often credited with the discovery that lightning could be harnessed.

If this is for a homework assignment, I believe the answer you're looking for is Benjamin Franklin and Micheal Faraday.

Possibly:-

Sir Humphrey Davy

Hans Christian Oersted

and Charles Augustine de Coulomb, whom the SI unit of charge is named after.