Most basic compound of the following amines is

 

 

In Pyrrole lone pair involved in aromatization, so least basic of all. In Aniline, lone pair is in conjugation, hence less basic than others. ${\mathrm{sp}}^2$  ‘N’ is less basic then ${\mathrm{sp}}^3$’N’.

$\therefore$Order of basicity is Cyclohexylamine >pyridine>Aniline>pyrrole