- Trustport AVG + Bitdefender (Dr. Web removed)
- Emsisoft In-house + Bitdefender
- Dr. Web Security Space In-house
- GData In-house + Bitdefender
Emsisoft has a very powerful Behavior Blocker, anti-exploit & Anti-malware Network (online verdict on suspicious files). It does require frequent user intervention at times, and there are some FPs, but the recommended choice shown is usually fair. Light on resources.
Trustport is not quite tested and less known.
GData has impressive performance at
AV-Tests. Both seem to do fine in the limited tests seen at the
Malware Hub (MH) here. I do not have an experience with the two though.
Regarding
Dr.Web, the problem here will be that not many people have tried it to be able to provide you with a balanced feedback. Even I haven't, except for its on-demand tool 'CureIt'. I have seen 'Dr.Web Security Space' in action at MH and surprisingly, it covered a range of threats, though the system was usually being infected.
If you're interested, you can refer
@Der.Reisende's Dec 16 - Jan 17 testing &
@Brodyaga's April 17 testing at the MH, for Dr.Web and Gdata respectively.
If you can try them all, that will be very helpful in your selection. Otherwise, I would recommend Emsisoft and then Gdata here.