I don't like the shady back room deals and underhanded tactics myself. But, these are a far cry from being indicted or convicted of actual crimes.
Maybe these recent incidents (no need to mention the Watergate, etc. events) meet your criteria:
Former Connecticut Gov. John G. Rowland,
Republican Rowland resigned from office and later pleaded guilty to one-count of deprivation of honest services on December 23, 2004.
Rowland was allegedly using public funds to pay for vacations and other extravagances. He served 10 months in a federal prison.
Former Rep. Duke Cunningham,
Republican-Calif.
The congressman pleaded guilty to charges of conspiracy to commit bribery, mail fraud, wire fraud and tax evasion on Nov. 28, 2005.
Former Illinois Gov. George H. Ryan,
Republican On Sept. 6, 2006 the former governor was sentenced to prison on fraud and racketeering charges.
Lewis Libby,
RepublicanThe Chief of Staff for Vice President Dick Cheney was convicted of perjury and obstruction of justice in the Plame Affair on March 6, 2007. His sentence was later commuted by President George W. Bush.
Former Idaho Sen. Larry Craig,
Republican The former senator was arrested on June 11, 2007 for "lewd conduct" in a public restroom.
The scandal eventually led to his retirement from the Senate, thus ending his career in politics.
Former Rep. Rick Renzi,
Republican-Ariz.
On June 12, 2013, Renzi was convicted on 17 of 32 counts in a corruption case, accusing him of using his office for personal financial gain.
Rep. Trey Radel,
Republican-Fla.
The congressman was convicted of misdemeanor possession of cocaine on November 19, 2013.
Radel's arrest seemed particularly ironic considering the congressman's support of mandated drug tests for welfare recipients.