I've tried many phones so I can help you out a bit.
The Note 4 has fairly lousy reception: it's not as horrific as that of the Note 3 but it is significantly worse than the Moto X (2013), which is the best Android phone I have tested for reception thus far.
The HTC One (original) and M8 both have fairly good reception. Definitely above average.
The Xperia Z3 has some of the best reception out of any phone I have tested, it looses just to the Moto X (2013) which is slightly better.
The Moto X (2014) is slightly worse than the 2013 Moto X but not a lot.
The Nexus 5 has average reception.