IS quality canned wet food a complete diet?

I'm sorry if this has been asked 100 times before but I couldn't find much when searching the forum, and I searched the net as well.

Is a good quality canned wet food for cats a complete diet or does it lack anything? I know that it is a myth that cats need the dry food to clean their teeth, but is the wet food lacking anything nutritionally that the dry food contains? some people have told me that I can feed just canned wet food if it is high quality, then I have also heard that wet food lacks in some things that dry food has, so I am totally confused. Right now I am trying to get my (recently adopted) obese cat's weight down - his old owner was feeding him a lower quality dry "diet" cat food, 3/4 cup a day, now I am trying to get him to eat a good quality wet food, but I am unsure if I should supplement with some dry food as well, I was thinking Orijen? He seems to be picky about the wet food as he is not used to it, but I don't want him eating the junky old diet food that the old owner gave me. Any advice? Thanks.

When you change foods - remember that you need to switch slowly, over a period of several weeks. I'd focus on changing dry foods first, and slowly add in wet food? I don't know if doing everything at once, on top of just moving in with you in the past 2 days, would be too much for him.

As always - I suggest you work with your vet on a weight loss plan.

Canned food, btw, is nutritionally complete. There are some foods out there (like Sheba's little tins) that are not nutritionally complete & say so on the label.

VET first and get a game plan for a SLOW wt loss ...

Read the fine print on canned you want one that says complete and balanced for " all life stage" , growth and maintenance or adult maintenance

There is nothing contained in dry food that isn't in wet food that cats need