People are really underrating tsunade. Anyways...
Hokages:
- She can't beat any of them, except old hiruzen and minato. Minato sounds ridiculous but its possible. She would need to activate her regeneration technique. Then she could let minto mark her and attack her. The key to beating someone like minato is to create opennings - thats why people like itachi can beat him using their genjutsu. The way Tsunade can create an openning is by letting minato attack her while her regeneration jutsu is active - he cant really do anything to kill her (except deamon seal). If she allows him to attack her and is unfazed by the attack, this kinda leaves minato open for attack. She could just try and go for the kill straight away or use her body path derangement jutsu (the one she used against kabuto). People forget about that jutsu!
Mizukages:
-She can only beat Mei and MABE the 2nd mizukage. Mei could keep tsunade away using her water dragon but if she's got her regenerations active, its aint gonna do anything. Her lava jutsu is easily avoidable and her acid mist damages very slowly.
-2nd mizukage will be EXTREMELY difficult for her to beat. If she abile to figure out the way around his techniques, she has a chance. The only way she can find the clam is by punching the ground or mabe using katsuyu's acid spit. But once he uses Joki Boi, its all over.
Kazekages:
-She has a chance against gaara as long as its not in a desert. No chance against the 3rd kazekage (the strongest one of them all).
Raikages:
- She cant beat 3rd raikage but she might be able to beat A, the same way as I think she could beat minato, but ultimately, I think it would end up being a stalemate.
Tsuchikages:
- No chance. She cant tank a jinton!