If you are interested in heterodox economics, Steve Keen is someone you should be aware of as a heterodox economist par excellence. He did a very good talk on the credit crunch at the LSE in 2012 which was broadcast on BBC Radio 4’s Analysis programme, available here http://www.bbc.co.uk/programmes/b01j5h51. The tone is pithy and is aimed at the layman.
He wrote a book call Debunking Economics, which I can recommend, and a keeps a blog at http://www.debtdeflation.com/blogs/. Broadly, the book talks about Minsky, Safra, and the not very plausible hypothesis in orthodox economic theory that one good in one market then abstracts to all goods in all markets. As befits a book which sits somewhere between textbook and polemic, his arguments are thoroughly exposited.
There is also available on the internet a talk he gave in Germany in 2014 to economics students which includes a great demonstration of his Minsky modelling programme and also about his broader ideas on including money and banks in macroeconomic models, which is available here http://www.debtdeflation.com/blogs/2014/09/23/the-overdue-copernican-revolution-in-economics/ and which I have cheekily embedded below.
Prof. Keen’s tone is at times amusingly blunt but he is conceptually convincing.