I understand your requirement very well. You can find drop shipping companies for these products/brands. There are multiple wholesalers, and drop shippers however here are a few you can connect with -
https://brandsgateway.com
https://www.salehoo.com
Salehoo is the true drop shippers who can tie up with them to sell products directly in your website. However, before building any e-commerce business you have to ensure that you understand the suppliers and the target market.

When it comes to brands like Gucci and other designer clothes, these are sold under license from the houses themselves or buy distributors. You could apply to become an authorized retailer of their brands. Not following these channels could lead to creating a gray market or black market supply, both of which could be seen as illegal supply of goods. I would be very wary of doing business that does not follow the proper channels.

Each of those items will have different supply sources.

The simplest way is to join the appropriate industry association, subscribe to their magazine and go to their conference/expo. You will meet all the vendors. You can also simply buy their trade directory.

I am importing designer clothes, glasses and perfumes from China to Europe and can help out with suppliers. The profit margin there is good, however electronics are tough - especially gaming consoles.

Here is why:

Pick a brand that manufactures certain items in China. Ralph Lauren Polo shirts are a good example. You buy them here for roughly $17 a piece from a 'third shift supplier' and then resell them anywhere for $24 or in some countries up to $39. That profit margin makes sense.

With electronics, due to the lower profit margin, you'll make around 3 times the profit of a shirt, however the money used is 10 times higher, demand is lower and in case you end up with a non-paying customer you have more money 'blocked' in storage.

Glasses are good, profit margin is even higher than with clothes, however you will sell seasonally (e.g. in Spring/Summer). I would focus on RayBan, because they are timeless, make good sales and contrary to their advertisements are actually made in China and not in Italy.

And don't make the rookie mistake of buying from alibaba or aliexpress and thinking that you have a good deal - there are much better ones. Or you end up with fake items that get seized in customs.

It's not complicated. If you really want to do this I can walk you through, find you suppliers and answer any questions you might have.

George