Two former high-profile Labor MPs, Eddie Obeid and Ian Macdonald, have been found by the NSW ICAC to have acted corruptly and referred for possible criminal charges.

Following the largest corruption investigation in NSW history, the Independent Commission Against Corruption (ICAC) on Wednesday handed down three reports.

Commissioner David Ipp has recommended that Obeid and Macdonald be considered by the Department of Public Prosecution (DPP) for possible prosecution over their involvement in the Mount Penny coal mine.

Obeids’ son Moses, and businessmen Travers Duncan, John McGuigan, John Atkinson, John Kinghorn and Richard Poole were also found to have engaged in corrupt conduct.

Operation Jasper investigated reports that Macdonald rigged a 2008 tender process to grant a coal licence over land at Mount Penny owned by the Obeid family.

It enabled the Obeids to make $30 million, with the prospect of earning at least $70 million more.

As part of the Indus investigation, ICAC found Obeid’s son, Moses, engaged in corrupt conduct over a $10,800 car for former Labor minister Eric Roozendaal.

The corruption watchdog investigated whether Roozendaal received a new Honda CRV at $10,800 – less than its original value – in return for political favours for his colleague, Eddie Obeid.

The ICAC reports said that Moses Obeid “provided a benefit to Mr Roozendaal as an inducement for him to show favour to Obeid business interests in the exercise of his official functions”.

Roozendaal was not found to have acted corruptly.

In the third report, the ICAC found Macdonald pocketed rewards for facilitating meetings with energy executives when he was energy minister.

Ipp said Macdonald used his ministerial influence on a number of occasions to benefit businessman Ron Medich, and was rewarded with the services of a prostitute called Tiffanie, arranged by ex-boxer Lucky Gattellari.

The ICAC has recommended the DPP consider prosecuting Macdonald for the offence of corruptly receiving a benefit from Medich and Gattellari as a reward for favours.

It said he should also be considered for the charge of misconduct in public office.

Ipp has also that advised the DPP consider prosecuting Medich for corruptly giving a benefit to the minister.

The findings follow six months of sensational hearings and more than 150 witnesses.

Obeid has maintained his innocence and previously said he would challenge any adverse findings against himself or his family in the Supreme Court.

The findings mean Labor could now be dogged by years of prolonged court battles with all major parties having so far denied any guilt.

Obeid and Macdonald have already been expelled from the Labor party.

Roozendaal, who has quit parliament, was suspended pending the findings.

Eddie Obeid said the ICAC report was superficial and biased and he denied he had acted corruptly.

However, he said he had anticipated the adverse findings given what he described as the animosity of both counsel assisting and the commissioner during hearings.

“I reject the assertions by the commissioner that I acted in any way that could amount to corrupt conduct,” he said in a statement.

He also indicated he would take legal action to seek a review of the findings.

Moses Obeid issued a statement denying any wrongdoing.

“I deny any unlawful behaviour on my part,” he said.

“The allegations against me are strongly denied as is any suggestion that I have acted corruptly.”

He said he would consult his lawyers before making any further comment but was committed to defending his “good name and reputation”.

Roozendaal said the ICAC had cleared him and restored his reputation.

He thanked his family and friends for their support and love through what had been a difficult and traumatic time.

“I have always maintained that I acted appropriately and ethically during my parliamentary career and in the best interests for the people of NSW,” he said in a statement to AAP.

“I am glad we can move on now.”