Mothership - The Inspiration

Gonna need you some Doors, Radiohead, Tool, reach back in time and grab you some Cream, some Santana, do not ignore the Janis Joplin, the Robin Trower, Jethro Tull, pile on the Pink Floyd, come back closer to today to get some Pearl Jam and some Rage Against the Machine...
Then go buy more Radiohead, and you're set for a month or two :)

White Stripes started out channelling Zep on their first couple of records.

Leafhound-Growers of Mushrooms
Not saying they sound like Zeppelin, but if you dig Zeppelin's sound then you will likely dig Leafhound.

It wasn't easy tracking my copy down at first but I scored at AKA Music in Philly on a random visit with my girlfriend.
Can be had right now at cduniverse for what I paid, $20.
Well worth it IMO.
Cheers & enjoy.

The problem is you started at the top. Like someone without any knowledge of what two channel stereo can do walking into a demo of a $250K system and then wondering what can I get that sounds like that for $3K. Many of the bands folks have listed are truly excellent but there is really only one Zep--IMHO the best rock n' roll band in history.

What artist and or album would you recommend that is along the lines of Led Zeppelin

My suggestion is a focus on the time frame that includes Led Zeppelin. There are so many bands to pick from during that time & the tangents you can take off on from there. For example, lets say you get interested in Deep Purple. You find out about this fellow named Tommy Bolin who played in James Gang & then check them out & find out about Joe Walsh.

It's pretty interesting how so many bands, styles & musicians are intertwined.