Hey @Ahmad Mian, welcome to the BP community!
Without knowing more about your investment strategy, goals & criteria, nobody will really be able to answer this for you. You're mostly just going to get other investors preferred neighborhoods based on their own investing plan, which may differ significantly from yours.
Honestly, even with more information, this is a very difficult question to answer. There are simply so many different neighborhoods in Atlanta proper as well as towns outside of the city but within the MSA. Are you referring to city proper only or all of the metro?
Much of the metro is zoned SFH (especially ITP) so you won't have a problem finding neighborhoods with single family homes. However, multifamily (residential or commercial) is pretty tough to come by and typically trades off-market. Best to run direct to owner campaigns in neighborhoods with small MF if that's what you're looking for. There are patches of these throughout the MSA but, from my experience, Norcross, Lawrenceville and Conyers seem to have a higher concentration than other towns.
Hope this helps a bit! With more info, hopefully we can better steer you in the right direction!