That's pretty hard, since I own (or have owned) many more than 5 amazing cameras.
But, ok, I'll have a go...
A) Cameras I still own:
1) Nikon Df (My best cam ever.)
2) Leica M8 (I still love it!)
3) Leica M6 (My favourite "film" camera.)
4) Fuji X-T1 (For everything it can do.)
5) Fuji X-E2 (For it's looks and smaller size.)
Others which need to be mentioned (no ranking): Nikon F3 HP, Fuji GW 690, Nikon F, Nikon F90x, Nikkormat FT2, Nikon D7100, Pentax K100D, Weltaflex, Moskva-5, Sony HX-20V, Leicaflex SL, Minolta XD7, Panasonic GF3, Pentax ME Super, Pentax Spotmatic SPII, Kodak Retina IIIc, Leica IIIa, Sigma DP1s, Lomography cams, Polaroids and so many others...
B) Very good camera I used to have: Sony NEX-7, Canon EOS 5D, Canon EOS 350D, Nikon D90...
C) Amazing cameras that weren't mine, but that I was allowed to shoot with: Mamiya 7, Leica M7, Hasselblad 500c, Leica M9, Leica M240, Leica M Monochrom, Olympus OM-D E-M Series (1, 5 and 10)...