1. SpaceX Falcon Heavy: The Falcon Heavy, developed by SpaceX, is the world's most powerful operational rocket. It is capable of carrying heavy payloads into space and is known for its reusable rocket technology, significantly reducing launch costs.
2. NASA Space Launch System (SLS): The SLS is a heavy-lift rocket developed by NASA for deep space missions, including potential crewed missions to Mars. It is designed to be one of the most powerful rockets ever built.
3. Blue Origin New Glenn: Blue Origin's New Glenn rocket is still in development but has garnered attention for its potential to be a heavy-lift launch vehicle for commercial and government missions. It is designed for a range of payloads, including crewed missions.
4. United Launch Alliance (ULA) Atlas V: The Atlas V is a reliable workhorse rocket used for a variety of missions, including launching satellites and crewed missions to the International Space Station. It is developed by United Launch Alliance.
5. Roscosmos Soyuz: The Soyuz rocket family, operated by the Russian space agency Roscosmos, has been a long-standing and reliable workhorse for crewed missions to space. It has a successful history of launching astronauts and cosmonauts to the International Space Station.
Please note that the space industry is dynamic, with new rockets and developments constantly emerging. It's important to verify the current status and ranking of rockets, as there may have been advancements or changes in the industry since my last update.