Question: Lucas Vorsterman was a Baroque engraver, he worked with which artist, a prominent English courtier during the reigns of King James I and King Charles I, but he made his name as a Grand Tourist and art collector, rather than as a politician?

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Anthony Mildmay (courtier): Anthony Mildmay was an English courtier and politician who sat in the House of Commons in 1640.  He waited on King Charles during his imprisonment and had care of two of his children after the King's execution.

George Villiers, 1st Duke of Buckingham: George Villiers, 1st Duke of Buckingham, ( ; 28 August 1592 – 23 August 1628), was an English courtier, statesman, and patron of the arts.  He was a favourite and possibly also a lover of King James I of England.  Despite a patchy political and military record, Buckingham remained at the height of royal favour for the first three years of the reign of King Charles I, until a disgruntled army-officer assassinated him.

Nicholas Poyntz: Sir Nicholas Poyntz (1510—circa 28 November 1556) was a prominent English courtier during the latter part of Henry VIII's reign.  There is a portrait drawing by Hans Holbein the Younger in the Royal Collection and an oil portrait after the same artist based on the drawing in the National Portrait Gallery, London.  One further portrait also exists after Holbein.

Cecily Boulstred: Cecily Boulstred (bap.  1584, d. 1609) was an English courtier and writer.  She was born to Edward Boulstred (d. 1595) and Cecily (fl.  1575-1608), the daughter of Sir John Croke of Chilton, in Beaconsfield.  Her parents Edward and Cecily produced nine other children, amongst them Edward (1588-1659), who served as a judge in the courts of chancery, king’s bench, the Oxford assize circuits, and the Warwickshire quarter sessions throughout his lifetime.  During her time at King James’s court, Boulstred became the frequent subject of scandalous works by poets such as Ben Jonson who threatened her reputation with rumors of promiscuity.  Many writers, including John Donne, used the event of her death as an opportunity to gain favor with her friend and matron of the literary arts, the countess of Bedford.  The only known written work of Boulstred’s is “News of My Morning Work,” probably written in 1609.  Spelling variations on her first and last name include "Cecilia", "Celia", and "Bulstrode".

Lewes Lewknor: Sir Lewes Lewknor (c.1560–1627) was an English courtier, M.P. writer and soldier who served as Master of the Ceremonies to King James I of England.  M.P. for Midhurst in 1597 and for Bridgnorth 1604-10.  His career has been described as a "tortuous trajectory rich in false starts, byways and rather nebulous interludes...[with] slippery religious and political allegiances".

Thomas Howard, 21st Earl of Arundel: Thomas Howard, 21st Earl of Arundel KG, (7 July 1586 – 4 October 1646) was a prominent English courtier during the reigns of King James I and King Charles I, but he made his name as a Grand Tourist and art collector rather than as a politician.  When he died he possessed 700 paintings, along with large collections of sculpture, books, prints, drawings, and antique jewellery.  Most of his collection of marble carvings, known as the Arundel marbles, was eventually left to the University of Oxford.

Lucas Vorsterman: Lucas Vorsterman (1595–1675) was a Baroque engraver.  He worked with the artists Peter Paul Rubens and Anthony van Dyck, as well as for patrons such as Thomas Howard, 21st Earl of Arundel and Charles I of England.

Philip Herbert, 4th Earl of Pembroke: Philip Herbert, 4th Earl of Pembroke and 1st Earl of Montgomery (10 October 1584 – 23 January 1650) was an English courtier, nobleman, and politician active during the reigns of James I and Charles I.  Philip and his older brother William were the 'incomparable pair of brethren' to whom the First Folio of Shakespeare's collected works was dedicated in 1623.

John Villiers, 1st Viscount Purbeck: John Villiers (c. 1591 – 18 February 1658) was an English courtier from the Villiers family.  The eldest son of Sir George Villiers and Mary Beaumont, later Countess of Buckingham, he was the brother of King James I's favourite, George Villiers, 1st Duke of Buckingham.

Lucas Vorsterman II: Lucas Vorsterman II, Lucas Vorsterman the Younger or Lucas Vorsterman Junior (1624 – between 1666 and 1676) was a Flemish Baroque engraver and draughtsman.  Her produced engravings after the work of the leading painters of the next generation and for the various book projects of the Antwerp publishers.

Supporting paragraphs: Lucas Vorsterman Thomas Howard, 21st Earl of Arundel
Answer: Thomas Howard, 21st Earl of Arundel