As far as I know no serious researchers have proposed this.
If we define "serious" as "conventional" or "mainstream", then yes, you are correct. No conventional or mainstream researcher, to my knowledge, has proposed that Angleton was disloyal to US interests as defined by the CIA.
On the other hand, quite a few unconventional researchers have raised questions about Angleton's loyalty. Spend a few minutes on google.com, and you will see what I mean.
Unconventional researchers come in all shapes, sizes and flavors. Some are kooks. Some are hatemongers. Some are professional disinformers. But some are just ordinary people whose research has taken them outside the bounds of mainstream opinion on some issue or other.
Most of my writings probably put me in the fourth category. For that reason, I tend to be more open-minded than most to unconventional views. I try to judge researchers by the facts and arguments they bring forth, rather than by their degree of conformity with mainstream opinion.
Regarding Angleton specifically, I can only repeat what I wrote above; I have not studied his case sufficiently to venture an opinion.