The Grand Comics Database credits José Delbo with the art on every issue of Dell's The Monkees. But he had nothing to do with the first issue, cover-dated March 1967 (also appearing in reprint as #17).
The inking is by Dick Giordano (with probably Frank McLaughlin and Sal Trapani helping out). But who the heck is the penciller? The super-skinniness of the characters may be an attempt at a comedic style and not, I suppose, part of this person's regular style. The attempt to draw some people the way Carmine Infantino would (on a really bad day) is another stumbling block rather than a help. Who is this?
Here, by the way, is a tier of Delbo art from the next issue—quite recognizable as his, and not the first-issue penciller's. D.J. Arneson wrote The Monkees, as he's said.