Question: Sharon Feingold is the on-air voice for the promo of the HGTV reality show based in Waco, Texas starring which two people?

Context paragraphs:
Tami Heide: Tami Heide, "The girl with two first names," is an American radio personality.  Heide started out as a disc jockey on Emerson College station WERS in Boston, Massachusetts in 1977.  She later served as music director of Massachusetts Institute of Technology station WMBR.  Heide worked at WBCN in Boston from 1984 to 1991, then took over the afternoon show at KROQ-FM in Los Angeles, California.  In 2005, she moved to KCBS-FM (Jack FM) in Los Angeles, where she was responsible for writing much of the dialogue for the on-air voice.  Heide left KCBS-FM in November 2016.  In June 2017, she joined Los Angeles smooth R&B station KTWV for weekends and fill-in-work.

The Antonio Treatment: The Antonio Treatment is a one-hour weekly docu-design series show on HGTV and is hosted by Antonio Ballatore, who won Season 4 of the HGTV reality show "Design Star".  The pilot episode aired on January 1, 2010 and the show officially premiered March 14, 2010,

Dream Job: Dream Job is an American reality television show from ESPN, which began on February 22, 2004.  It was the network's second reality show, with two editions of "Beg, Borrow & Deal" having previously aired.  However, this was the first reality show from a network to offer its winner an on-air place on one of its shows.  The show was hosted by Stuart Scott.

Tom Postilio: Tom Postilio is an American luxury real estate broker, television personality, and former professional singer.  He is a broker at Douglas Elliman, the largest real estate brokerage in the New York Metropolitan area and the fourth largest real estate company in the United States.  He is known for brokering high-end luxury real estate to a celebrity clientele and is a star of the HGTV reality television show "Selling New York".

All American Handyman: All American Handyman is a HGTV reality competition show between a group of handymen and women.  The show is hosted by Mike Holmes and Scott McGillivray.  It is a spin-off of "Handyman Superstar Challenge", with similar challenges.  A revamped "Handyman Superstar Challenge" is based on "All American Handyman", called "Canada's Handyman Challenge".

List of Fixer Upper episodes: "Fixer Upper" is an American reality television series airing on HGTV starring Chip and Joanna Gaines, based in Waco, Texas.

Sharon Feingold: Sharon Feingold is an American voice actress.  She voices the majority of the on-air promos for HGTV and can be heard in promos for shows such as Fixer Upper, Property Brothers and House Hunters.  She is the voice of the ATL Skytrain and The Plane Train (since March 2012) at Hartsfield-Jackson Atlanta International Airport, as well as the Incline Railway at Chattanooga, Tennessee's Lookout Mountain.  In May 2010, she appeared as herself on Celebrity Apprentice as a hired voiceover talent for team Tenacity.  She is the voice behind three long-form TV specials for MTV.

Back to Reality (TV series): Back to Reality was a reality television show featuring stars from previous reality television programmes.  The show was broadcast on Channel 5 between 15 February 2004 to 5 March 2004.  It was advertised by Channel 5 as being "The biggest reality show of all time" however in terms of ratings, it failed to deliver.  The 12 contestants spent 3 weeks in a studio built mansion, with no natural sunlight.  In the final two weeks, the public voted for their favourite housemate with the two people with the lowest votes every 3/4 nights being put to the housemate vote, where the other contestants has to vote for who they wanted to leave.  The show was presented by Tess Daly and Richard Bacon, the first and only series of the show finished with James Hewitt winning the show ahead of Maureen Rees and Craig Phillips.

Fixer Upper (TV series): Fixer Upper is an American reality television series airing on HGTV starring Joanna and Chip Gaines, based in Waco, Texas.  The show's pilot aired in May 2013, with the full season 1 beginning in April 2014, season 2 began in January 2015, season 3 began in December 2015, and season 4 began in November 2016.  Season 5 will premiere on November 28, 2017 and will be the final season.

Mark Tacher: Mark Tacher Feingold (born September 15, 1977) is a Mexican actor, musician, vocalist, guitarist, and a television host.  He began as a television host in 1996, and has starred in a reality show, TV series, and telenovelas including "La Hija del Mariachi","Verano de amor", "Alma de Hierro", "Para Volver a Amar", "Mujeres Asesinas", "Triunfo del Amor", "La Voz... México", "Abismo de pasión", "Qué pobres tan ricos", and "Que te perdone Dios".

Supporting paragraphs: Sharon Feingold Fixer Upper (TV series)
Answer: Joanna and Chip Gaines