Former US Congressman Barney Frank, a towering figure who reined in Wall Street after the 2008 financial crisis and became the first known openly gay member of Congress, has died at 86.

Representing southern Massachusetts for more than three decades, Frank entered hospice care in Maine in April. He was a chief architect of the Dodd-Frank Act, a landmark overhaul of banking regulations that created new oversight bodies and curbed high-risk lending following the subprime mortgage meltdown.

Frank also championed LGBT rights. He was the first sitting member of Congress to enter into a same-sex marriage and pushed to end the military's "Don't Ask, Don't Tell" policy.

His sister, Doris Breay, confirmed his passing and said he was at peace. Former campaign manager Jim Segel called Frank a leader for marginalized communities and a key figure in navigating the worst recession since the 1930s.