Which Jazz Albums are similar to Kind of Blue

Within Miles, try Round About Midnight

Another artist you may like is Philip Catherine. While he's not really like Miles "Kind of Blue", I think he appeals to those who like that genre. I would start with 1) "Transparence", and 2) "Philip Catherine/Bert Joris Brussels Jazz Orchestra - "Meeting Colours" ; but, really anything by him is worth having.

The Cannonball Adderly offerings with Bill Evans and Milt Jackson are must haves. Now they are more boppin than KOB but if you buy the re mastered extended CD's the sound will not disapoint.

while kind of blue is an album on its own league (that's what makes it so remarkable too) you might want to try Coltrane's Blue train. this is an all-assault on melodies and rhythm. you won't believe your ears and your foot will never stop tapping to the beat.
other recommendations:
john coltrane 'my favorite things'
john coltrane 'giant steps'
the collaboration albums between ella Fitzgerald and louis armstrong (they're all great stuff!)
sonny clark 'cool struttin'
kenny dorham 'quiet kenny'
kenny dorham 'whistle stop'

and there are many others, but this is a good start!
best wishes!

I can't imagine that you wouldn't also love Miles' "In A Silent Way". Great discs to play one after the other.