Perhaps not strictly “no-strings-attached” but many of the 2008 bailouts were functionally mechanisms to avoid nationalisation.

Lol the jail free bailouts of the banks in 2008? Goldman got billions from the bailout of AIG, management got millions and millions in bonuses....

Those bailouts were generally loans that were paid back. Pretty far from a "no strings attached blank cheque".

Any Federal corporate tax relief at all. They put the pedal down on accelerated depreciation after 2008, though it existed over 20 years ago.

Any swapping of Federal Reserve bonds for corporate bonds, say during the pandemic.

Any cost-plus defense or aerospace contract.