There's no uestion that he was intelligent.
But smarter than Near? no.
I'm sorry but I believe that whatever skills/knowledge you think you have or actually do is somewhat dependent on experience.
Near followed his gut instinct and lived.
L ditched his gut instinct and died.
I reiterate: L was too dumb to live.
Especially since he was more or less world reknowned and would have had all the requisites to solve the case of Kira's identity and his success rate was pretty high. He possessed almost all the skills and knowledge necessary to discover Kira's true identity.
And while Light was pretty smart, there's still no excuse for L's untimely demise due to careless miscalculations.