The Airbus A380 was first flown by Singapore Airlines commercially in 2007. It is the largest passenger plane in the world. It's two decks are massive, upstairs is usually the Business and First Class, which some airlines made amazing, adding fountains, plants and pods.
Boeing 747
The Boeing 747 is known as the "jumbo jet". It was the first passenger jet with an upstairs area. Sadly, many accidents have happened, but, most have nothing to do with the 747s design. The Tenerife Airport Disaster was caused by bad communication, Japan Airlines 123 was caused by poor maintenance and more.
Airbus A350 XWB
This brand new aircraft. It was set to compete with Boeing's 777 and 787. It can hold around 280-366 depending on the design. It was first flown by Qatar Airways.
Boeing 777
This wide bodied jet was introduced in the 1990s. Although it has had not many crashes some notable ones would be British Airways 38, Malaysia Airlines 370 and Malaysia Airlines 17.
A340
The Airbus A340 is a four engine aircraft with no upper deck. No serious accidents have occurred to this type of plane. It can seat up to 375 passengers.