Yup, i think he can beat everyone in akatsuki except those people you mentioned.
One who can't see micro bombs can't defend against them.
He definitely CAN win against those opponents, the question is if he's the favorable choice or not. C4 is deadly but it's not something he pulls out every fight, so that should be kept in mind. Depends on the particular opponent too.
Why not Itachi, I guess you do not want to be flamed.
Kakuzu has Raiton, which makes his bombs pretty much useless. Kakuzu's elemental attacks would also be hard to avoid for Deidara
It's also pretty likely that Sasori had some electrical attacks, since he was after all able to use all KKG's of his human puppets, but obviously that can't be proven though. Sasori is also immune to C4, seeing as he doesn't need to breathe. And Deidara even stated that Sasori was the stronger one out of the two.
Aside from these 2, I think you're right
he can't win against kisame .(water should be stronger than fire explosions)
Well what do you mean? Deidara stated himself that he hates using his better pieces of art because it degrades their value to him. He had full intentions of killing Sasuke all along but he only used C4 when he got truly pissed. I do know that Deidara has other things then C4, and I actually believe that some people underestimate his crafty intelligence too. When he decides to use C4, it's dangerous because it doesn't have to be that huge bomb he used. He can make human-sized C4 bombs too like he did against Sasuke.In a one on one fight deidara does not have to hold back to use C4. Its a deadly jutsu, he wins mostly unwounded. But its not just C4, he has range of jutsus.
Why not Itachi, I guess you do not want to be flamed.
Considering a fresh fight wherein no one knows others ability. In such a case will kakuzu be able to make deduce that clay bombs are useless against raiton.? even then he wont be able to clay mines. even C4 as well.. still deidara has upper hand.
Just stating Sasori stronger does not mean so. Even Itachi stated Jiraiya was stronger than him.. but that was not the case.
Well what do you mean? Deidara stated himself that he hates using his better pieces of art because it degrades their value to him. He had full intentions of killing Sasuke all along but he only used C4 when he got truly pissed. I do know that Deidara has other things then C4, and I actually believe that some people underestimate his crafty intelligence too. When he decides to use C4, it's dangerous because it doesn't have to be that huge bomb he used. He can make human-sized C4 bombs too like he did against Sasuke.
he can't win against kisame .(water should be stronger than fire explosions)