Go to http://www.aussprache.at and enter at »Orthographische Suche« the word who's pronunciation you want to know.

When you enter »angeblich« you will find, that the six speakers (female and male voice from Austria, Germany and Switzerland) always stress the fist syllable and sometimes also the second (male voice from Austria).

In the case of »ausführlich« you can her that four speakers stress the first syllable (speakers from Austria and Switzerland) while the others stress the second (German Speakes).

So I think that in all your examples all versions that you found are correct.

Go to http://www.aussprache.at and enter at »Orthographische Suche« the word whose pronunciation you want to know.

When you enter »angeblich« you will find that the six speakers (female and male voice from Austria, Germany and Switzerland) always stress the fist syllable and sometimes also the second (male voice from Austria).

In the case of »ausführlich« you can her that four speakers stress the first syllable (speakers from Austria and Switzerland) while the others stress the second (German Speakes).

So I think that in all your examples all versions that you found are correct.