The phrase "actually unchallenged" is correct and usable in written English.
It can be used to emphasize that something is genuinely or truly not disputed or contested.
Example: "Despite the numerous claims made against him, his position in the company remains actually unchallenged."
Alternatives: "truly unopposed" or "genuinely undisputed."
As a result the Commission's investigative work is now going to prosecutors who can actually pursue these cases with unchallenged subpoena power and better resources.
The strongest of the post-Soviet strongmen, Vladimir V. Putin of Russia, is actually a comparative newcomer, having reigned unchallenged for a mere decade now.
First, because it is useful to be reminded, in a time of renewed fundamentalism, that religions actually have no fundament: that the inerrant texts and unchallenged holies of any faith are the work of men and time.
I roamed the grand old building unchallenged, no one told me to leave (actually there was one time in 2003, long story).
"I thought it was great that voters were not resigned to just sit it out and accept an unchallenged incumbent they found distasteful, that they actually began formulating a plan to change the status quo".
Sturridge clipped a cross into the centre and, though the Welsh players appealed en masse for offside, the ball had actually spun off the head of Williams before reaching Vardy, unchallenged, inside the six-yard area.
I was not willing to let those wild allegations about its lethality go unchallenged, however, so I pointed out that the ACMD's report actually "makes it clear that we cannot say that the 25 deaths linked to the use of mephedrone were caused by mephedrone".
Its success lies on a continuum of movies that go largely unchallenged by critics and audiences because they absolve certain viewers from actually having to care about the larger implications of their themes.
Flawed assumptions go unchallenged.
The planes landed unchallenged.
