John Tartaglia

John Tartaglia (b. February 16th, 1978) is a Puppeteer that worked and built Muppets for Sesame Street and Bear in the Big Blue House. He also worked for the Jim Henson production of Little Shop of Horrors.

Official bio
from sesameworkshop.org:

John Tartaglia has been a Muppeteer with Sesame Street for the past nine seasons, starting at age 16. On Sesame Street, he performs Alfred Duck, and a host of other Muppets ranging from penguins to sheep. Tartaglia is also part of the "Elmo's World" team of computer-graphic puppeteers. Recently, he had the honor of playing the Muppet, Tingo, in Sesame English, which airs internationally. He also played the part of DJ 2 in Animal Jam, a new Jim Henson Company series airing on Discovery Kids! Tartaglia's work can also be seen in The Book of Pooh, Bear in the Big Blue House, Between the Lions, and Dog City. An accomplished musical theater performer, he spent his teenage years dancing as Cookie Monster and Oscar the Grouch at Sesame Place in Langhorne, PA, and was recently on Broadway in Avenue Q, the acclaimed hit musical, playing the lead role.

Characters that he performed
Alfred Duck, Phoebe, DJ 2, Ernie, Tingo, Hoots the Owl