One of my golden rules when it comes to hair color and skin tone is do never have a hair color that's lighter then the skin color. But I don't think you have to worry since you said you are very white meaning pale then I'm sure you won't get too dark no matter how much you tan. Go for the look in the image and you will get a healthy glow rather then a the black and white cookie look
It would only look tacky if your tan was orange like fake spray tans. With the picture you showed the blond is not crazy looks very natural just try not to get to dark or go platinum or you will look kinda crazy . Theirs a lot of beautiful natural blondes with colored eyes that are medium to tan skin tone like this girl link
Natural tan is usually very pretty. As long as you're not laying in a tanning bed and/or turning yourself orange, your fine. If anything, ask your hair dresser in the summertime what color he/she suggests. They would be able to give you an honest answer and awesome color.
Nope! Tan and blond can look tacky, but that's only if you have like bleach blond hair and orange skin. Just keep it natural and your good. There are a lot of tan blond people out there! Example: Victoria's Secret Models, no worries my friend