Alfred the Great
This is wrong. It really depends on the question which is a bit vague. The Angles and the Saxons were separate tribes which invaded Great Britain from Angeln and Saxony respectively. Who their original leaders were is not really known apart from in surviving genealogical "king lists" for the various Anglo-Saxon kingdoms which they established. In the case of the Angles, the names
Wuffa,
Eoppa,
Ælla and
Icel are given as their progenators of their dynasties. Of the Saxons we have the names
Cerdic (who was almost certainly not a Saxon but probably half Welsh and half Saxon),
Ælle and
Æscwine. The Jutes were established by
Hengist and
Horsa.
The various small Anglo-Saxon kingdoms which preceeded the unification of England each had many kings. These kingdoms were almost all destroyed by the Vikings in the mid 9th Century. At the end of the 9th Century the kingdom of Wessex under their dynamic king
Ælfrēd se Grēata (Alfred the Great) and later by his son and successor
Ēadweard se Ieldra (Edward the Elder) drove out the Vikings/Danes and laid down the foundations of the future Kingdom of England. Eventually king
Æðelstān (Athelstan) of Wessex was crowned King of the English in 927AD.