Obito can trap Hidan and Konan in the Uchiha Batte. Encampment. Neither have the fire power required to escape.
Kisame's Water techniques are useless since he'll just phase through them. All he needs to do his get close and touch him then its over, or get close and fire those shuriken from his eyes. To prevent interference from the other member while he takes them all out one by one, he can have Black Zetsu hold them off(he could fight a Mizukage, several jonins and KM Naruto)
He can simple sink underground and re-emerge behind Sasori then unleash a wave of large shuriken to stab through him or use his fire techniques.
Deidara's attacks are known to him so he can evade them, get close and shuriken or warp Deidara. If Deidara uses C4 or CO he'll just go intangible and let Deidara kill everyone
Kakuzu's ability to act through many hearts and increase his body size with his long range mode will pose quite a problem since once Obito goes tangible to warp him, the hearts will attack with massive long range techniques and Kakuzu's body is quite large in long range mode so it'll take a longer period of time to warp him, however, if he can trap some of the jhearts in the Uchiha Battle Encampment(a barrier that could withstand the full power of a Tailed Beast punch with no damage) and warp some away with Kamui leaving just good ol' Kakuzu, enough shuriken in the back, using his weaker level of Mokuton to capture and suppress his chakra and Kakuzu's done.
Orochimaru is a VErY big problem. He can vomit himself to prevent being KAmui'd then take advantage and attack Obito while he's solid by stabbing with Kusanagi or using a Five Element Seal to inhibit his chakra or render him unconscious. Even sneaking up behind him to use shuriken to tear him apart is useless since he's immortal. Obito's best chance is genjutsu or using his weaker form of Mokuton to capture Orochimaru and suppress his chakra. Considering the massive Mokuton Obito could accomplish as a kid, it won't be impossible for him.