Don't you wish someone in the series called him Del Boy?
I looked over Tarrant's wiki, and how he seemed to go from pirate to freedom fighter overnight. And from Space nazi to Han Solo the night before that. He's a creature of opportunity more than a man with any real plan.
It doesn't really make sense why he changes his career so often?
Although this is interesting...
The very first episode of the series, "The Way Back", features a Federation security agent called Dev Tarrant who arranges the massacre of Blake's friends and the murder of his lawyers. No connection is made between him and Steven Pacey's character when the latter joins the series.
A third Tarrant brother?
Of course there's an audio made in the 90s without a license, but somehow with original cast, that says that Blake is not real. They just program his personality/memories into random trouble makers every couple years to draw out any local resistance cells, and then everyone dies on a penal colony a couple weeks later.
Running across the Liberator ruined the selfcleaning features of their "saftey-valve" which the Federation used to periodically ensure harmony, and they can't make a new Blake until this one is dealt to, or the jig would be up.
Which is surprisingly similar to the revelations dug up in the Matrix II that were ignored and never mentioned in the Matrix III.
So for what ever is deficient about Del Tarrant, at least he's not a made up social engineering widget gone rogue with delusions of existence.