Shryne had gotten a few hits on pre-ANH Vader, moved in a blur, withstood Vader's shrapnel attack etc. Bondara admirably held off Maul's doubled offense, but it was noted he wasn't a match for him.
I guess it depends on what you think is more impressive- fighting against Vader while dying of bleeding internally or holding your own against Maul though it was noted Bondara was no match for him.
I'm going with Shryne.