Does Emily dickinson use iambic pentameter the most out of all poets?

Iambic Pentameter is the main metre of English poetry. Almost all the major English poets use it at least some of the time.

The first great poet to focus mainly on Iambic Pentameter was Geoffrey Chaucer. The greatest poet to write in Iambic Pentameter was William Shakespeare. John Milton was the poet who established Iambic Pentameter blank verse (unrimed verse) as the main narrative form for English poetry. John Dryden developed Iambic Pentameter riming couplets (Heroic Couplets) as the main English metre for satires, fables, and other occasional verse.

Of course, some poets who did not write in Iambic Pentameter are also important to the development of the metre. Samuel Butler chose Iambic Tetrameter for his satirical epic Hudibras. Hudibras established Tetrameter as the 'silly' metre in English; this indirectly helped Pentameter to establish itself as the 'serious' metre.