Jose Manuel Barroso
He was president of the Social Democratic Party (PSD), he served as vice-president of the European People's Party (EPP) before being elected the Prime-Minister of Portugal. He was first nominated as president of the Commission in 2004 and was again nominated for a second term in 2009.
Barroso's Page: http://ec.europa.eu/commission_2010-2014/president/index_en.htm
Barroso's Youtube Channel: http://www.youtube.com/user/barroso
President of the European Council - Herman Van Rumpuy
The former Belgian prime minister and member of the Christian Democratic & Flemish Party (CVP) took office as the first President of the European Council in December 2009.
Van Rumpuy's Page: http://www.european-council.europa.eu/the-president.aspx
Van Rumpuy's Youtube Channel: http://www.youtube.com/user/hermanvanrompuy
Positions
President of the European Parliament - Martin Schulz
A member of the Social Democratic Party of Germany, in 2004 he was elected group leader of the S&D in the European Parliament and was elected to President of the European Parliament in January 2012.
Visit Schulz's Page: http://www.europarl.europa.eu/the-president/en/president/biography.html