Oh thats easy. You could easily rattle off Harriet Harman, the antimale bigot, or Jackie Smith the Incompetent, or Alan Ainsworth, the Useleess Defence Secretary but the easy winner is......
Peter Mandelson. A slimy, conniving two faced liar who has spent 20 years lining his own pocket with public money, and has actually bee ejected from public office twice for dishonest. Spent his entire time in Brussels selling us down the river and stabbing us in the back, whilst filling his own pockets by selling favours and patronage, and using his public position for his own person advancement.
Rotten, corrupt, untrustworthy, dishonest and thoroughly vile to the core, there is no one more repulsive than Peter Mandelson.