Mick Jagger.  Very good harp player and a pretty decent guitar player (as per Keef).

Mike Campbell.  Out of the shadows of longtime bandmate, Tom Petty - Mike now presides over the Dirty Knobs!

Randall Bramblett.  Keys, guitar, sax ... also, he's RANDALL FREAKIN' BRAMBLETT!

Jimmy Hall, y'all!  harp, sax and the baddest singer of all time!

I'll stop now.

Although Chris Robinson of The Black Crowes only sings in that band, having seen him several times in other bands, he's actually a very accomplished acoustic rhythm guitar player.  I saw the Chris Robinson Brotherhood twice and was very much impressed with him.  Also caught him in another jam band called Green Leaf Rustlers (w/ Barry Sless, Pete Sears and John Molo), and he played acoustic all night long.  And of course in both those bands, Chris handled all the vocals as well.  Because the Crowes always have included two excellent lead guitarists, Robinson has always been only a vocalist in that band, at least to my knowledge anyway.  

Here's a sample of Green Leaf Rustlers and Chris is actually playing electric, which I wasn't aware he did:

Joe Walsh, Gary Moore and Peter Green 🍏 come to mind. Decent vocals and fantastic lead guitar for all three. 

And let's not forget that lad from Liverpool ...

@rusty Actually all four of them. Ringo played and sang Act Naturally and Yellow Submarine until many joined in.

@robertdee The thread asked for "frontmen" who played instruments.  Four frontmen in the Beatles?  I suppose they all became bandleaders in the post-Fab 4 world, so I guess you're correct.  

Digressing slightly, in their earliest days I (as a 6 year old kid) perceived John Lennon to be the leader (front man).  Watching that Let it Be doc' a couple of years ago - it sure seemed like Macca was head dog on that sled.  Regardless - the Beatles were the ultimate combination of talent and personalities.  There have been better bands since but never any with greater impact on the world.

But there is another frontman who plays instruments who had as broad an influence - even on the Beatles themselves:

@robslob I saw Chris ... 15 years ago  with New Earth Mud.  He played (wore) a 335.  Didn't exactly light it up or anything, but he played it. 😉

Gotta love Joe Walsh.  Isn't there a Duane and Joe slide connection?

Posted by: @mulemewarren

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Gotta love Joe Walsh.  Isn't there a Duane and Joe slide connection?

The ABB and James Gang both played Ludlow Garage often. Joe has said Duane gave him a few slide lessons, including open E tuning. 

 A gent who absolutely should be in the Rock Hall - Paul Weller.

@rusty Yes Bob Dylan is a great example. Sometimes a harmonica and an acoustic guitar was the band. 

Dickey said Bob is America's greatest poet. 

@porkchopbob I remember in the early 70's Joe Walsh was in the cover of a music magazine and he is holding a copy of At Fillmore East and inside Joe talked about Duane advising him on some slide guitar technique. 

I like the sound of this Rickenbacker guitar on slide!! ( Joe owns over 100 electric guitars) 

Steve Winwood. 

Oh, and freaking JIMI HENDRIX!

@cmgst34 No doubt. Jimi could sing and bend those strings. 

This list would not be complete without:

Leslie West

Rory Gallagher

also- Todd Rundgren

Forgot about SRV. And what a powerful guitarist he was!!! One of the best. 

https://youtube.com/shorts/Krrr7u2E0x4?si=hVLBsO12BA6c_2Ln