Goldman Sachs' and Fabrice Tourre's fraud CDO deal hit several financial firms who were counterparties and buyers.

ABN Amro, purchased by RBS, was the intermediary in the deal. RBS eventually had to pay Goldman Sachs $840 million in the unwinding of ABN Amro's position in the ABACUS deal. This money eventually went to Paulson and Co.
RBS ABN Amro
ACA Capital Holdings, which was unaware of Paulson's position in the deal, sold CDS on the deal worth $909 million on the super senior tranche. ACA Capital has since gone through an unwinding, and is now existing as a run-off company.
ACA
IKB, a German commercial bank, got crushed by their buy into the ABACUS 2007-AC1 deal.
IKB