The ECJ had a lot of fascists in it's original setup and has probably the best documented histgory of cronyism in the EU - which is saying something!
Have a look at the short history in the London Review of Books.
https://www.lrb.co.uk/the-paper/v43/n01/perry-anderson/ever-closer-union
It has been suspect right from the start:
"There were seven founding judges and two advocates-general. Who were they?
The Italian president of the court, Massimo Pilotti, had been deputy secretary-general of the League of Nations in the 1930s. There he acted as the long arm of the fascist regime in Rome, advising Mussolini on what counter-measures to take to shield Italy from condemnation by the League for its actions in Ethiopia.
On resigning his post in 1937, Pilotti took part in the celebrations in Genoa of the conquest of Ethiopia; and during the Second World War headed the high court of occupied Ljubljana after Italy’s annexation of Slovenia, where resistance was met with mass deportations, concentration camps, and police and military repression.
The German judge on the court, Otto Riese, was so devoted a Nazi that without any duress – he spent the war as an academic in Switzerland – he retained his membership of the NSDAP until 1945.
His compatriot Karl Roemer, an advocate-general to the court, spent the war in occupied Paris managing French companies and banks for the Third Reich; after the war, he married Adenauer’s niece, and acted as defence lawyer for the Waffen SS charged with responsibility for the massacre of the occupants of the French village of Oradour.
The other advocate-general, Maurice Lagrange, was a senior functionary in the Vichy government, fully committed to the ideology of a ‘National Revolution’ to sweep away the legacy of the Third Republic. Acting as link-man between the judicial apparatus of the Conseil d’État and the political apparatus of the Council of Ministers, Lagrange was in charge of co-ordinating the first wave of persecution of French Jews.
When Laval took over the reins of Vichy in 1942, transferring Lagrange back to the Conseil d’État, Pétain thanked him for his ‘rare perseverance’ in the regime’s legislative and administrative work, to which Lagrange replied that ‘for me it has been a great privilege to be so closely associated with the enterprise of national renovation you have undertaken for the salvation of our country. I am convinced that every Frenchman can and should take part in this work.’