You definitely know of the Edison vs Tesla rivalry. Edison allegedly invented Direct Current while Tesla is the alleged inventor of Alternating Current. Before the discovery of AC by Tesla, DC generators were the ones being used worldwide for power production and distribution. Before Tesla, no one had knowledge of AC and DC was thought as the only way power could be produced and generated. Then the "War of Currents" started, one of the greatest battles in history. The winner was going to be chosen as the worldwide generator and distributor of electricity. Edison was a staunch advocate for DC power. After Tesla quit working for Edison, he began developing a current that would challenge Edison's Direct Current.
Direct Current was inefficient and could not transmit electricity over long distances. Moreover, DC generators would fail frequently and had limitations that constrained their efficiency. Telsa's development of the AC induction motor and polyphase AC system presented a more efficient way of power generation and transmission. It had numerous advantages over the DC, for instance, could be stepped up or stepped down.
During the War of Currents, both Edison and Tesla campaigned for their individual inventions to be chosen for worldwide power generation and transmission. Edison knew his DC was inferior but tried to deceive people that it was superior to AC by spreading misnfomation and even excecuting animals live using Tesla's AC, just to show that AC was dangerous. However, despite Edison's efforts, AC proved to be superior and even got more recognition after it was used in the first hydroelectric dam, Niagara Falls, and proved its superiority for large scale power generation and distribution.
Therefore Tesla's inventions can also be termed as a paradigm shift, it's just not as widely known as Einstein's. Prior to Tesla's works on AC, DC systems dominated the world in the field of power generation, transmission and distribution. Nobody knew of Alternating Current until Tesla made his studies in that field. This therefore qualifies to be a paradigm shift, it was his invention.
AC is what is used worldwide in modern electrical grid, which facilitated the widespread electrification of cities, industries, and households. Therefore, saying that Tesla only applied existing knowldge and that he did not revolutionize anything could be misleading. Nobody knew of AC and Tesla developed it, even if he applied knowledge by other scholars. He should be given credit, of which most of the time he doesn't. Ever thought of how the world would be if DC won over AC as Edison wanted. The world would be really different from what it is today. Therefore, is the invention of AC a paradigm shift? It definitely is, it revolutionized the modern world. It's just not as widely known as Eintein's paradigm shift. Most people do not even know of Nikola Tesla.