Which of these future monarchs was heir to the throne from birth?

Edward VII (Albert Edward; 9 November 1841 – 6 May 1910) was King of the United Kingdom and the British Dominions and Emperor of India from 22 January 1901 until his death in 1910.

The eldest son of Queen Victoria and Prince Albert of Saxe-Coburg and Gotha, Edward was related to royalty throughout Europe. Before his accession to the throne, he served as heir apparent and held the title of Prince of Wales for longer than any of his predecessors. During the long reign of his mother, he was largely excluded from political power, and came to personify the fashionable, leisured elite. He travelled throughout Britain performing ceremonial public duties, and represented Britain on visits abroad. His tours of North America in 1860 and the Indian subcontinent in 1875 were popular successes, but despite public approval his reputation as a playboy prince soured his relationship with his mother.

Elizabeth was third in the line of succession to the throne, behind her uncle Edward, Prince of Wales, and her father.

George was the younger son of the Prince of Wales, there was little expectation that he would become king. He was third in line to the throne, after his father and elder brother, Prince Albert Victor.

At birth, Victoria was fifth in the line of succession after the four eldest sons of George III.