What was Buddha's ultimate teaching?

There is claim that it was the LOTUS SUTRA. From http://en.wikipedia.org/wiki/Lotus_Sutra comes this:
...known for its extensive instruction on the concept and usage of skillful means – (Sanskrit: upāya, Japanese: hōben), the seventh paramita or perfection of a Bodhisattva – mostly in the form of parables. Mahāyāna sutra...the idea that the Buddha is an eternal entity, who achieved nirvana eons ago, but willingly chose to remain in the cycle of rebirth (samsara) to help teach beings the Dharma...the sutra indicates that even after the Parinirvana (apparent physical death) of a Buddha, that Buddha continues to be real and to be capable of communicating with the world. ...another Buddha, who passed long before, appears and communicates with Shakyamuni himself...the tathāgatagarbha sutras, which share certain family resemblances with the teachings of the Lotus Sutra. The Lotus Sutra also indicates (in Chapter 4) that emptiness (śūnyatā) is not the ultimate vision to be attained by the aspirant Bodhisattva:... Buddha Wisdom transcends seeing all as merely empty or merely labeled. The Lotus Sutra illustrates a sense of timelessness and the inconceivable, often using large numbers and measurements of time and space. Some of the other Buddhas mentioned in the Lotus Sutra are said to have lifetimes of dozens or hundreds of kalpas, while the number of Bodhisattvas number in the billions, if not more. The ultimate teaching of the sutra is implied to the reader that "full Buddhahood" is only arrived at by exposure to the truths expressed implicitly in the Lotus Sutra via its many parables and references to a heretofore less clearly imagined cosmological order...the sutra's stated tenets are that all other teachings are subservient to, propagated by and in the service of this highest truth, that there are not actually Three Vehicles as previously taught, but only One Vehicle leading to Buddhahood.
In the vision set out in this sutra, moreover, not only are Buddhas innumerable, but the universe encompasses realms of gods, devas, dragons and other mythological beings, requiring numerous dimensions to contain them. Buddhas are portrayed as the patient teachers of all such beings. (JW note - this is the sutra in which NOTHING IS MISSING).
The Lotus Sutra claims to be superior to all other sutras. Chapter ten of the Burton Watson translation states: ".. Medicine King, now I say to you, I have preached various sutras, and among those sutras the Lotus is foremost!"
Chapter fourteen states: "Among the sutras, it holds the highest place."
The entire translation is in my Academic texts folder.
For many other sutras: http://www.buddhistdoor.com/oldweb/resources/sutras/sutra_index.htm