Hi there!
Thanks for sharing your details with us.
For the husband: your UG performance falls behind the pack, but fortunately you have a strong GMAT to counter act that. It doesn't erase your UG performance, but it's a great score. For your two research papers, are you published? If so, that's great and you'll want to cite them in your application for the adcom to review. Your work experience is sort of run of the mill for your applicant pool. So, how do you stand out? You need too call out your leadership capacity with specific details. Being "the best" or being a "top performer" isn't quite enough. The adcoms at top schools need to hear about how you led a team to achieve a complex goal and how you overcame adversity to do it.
You have listed a lot of involvement activities, but they're all a bit generic. It's hard for me to judge your impact and contribution in these roles. Also, a piece of advice - I would omit your blood donations as an extracurricular. If it's something that's important to you, *perhaps* it may make sense to discuss it in your essays, but definitely not an involvement activity.
I think all of the schools on your list fall in the stretch category, but believe you could apply to 1-2 of them along with others in the top 15 in the US / top 15 in EU.
For the wife: UG GPA conversion doesn't seem right. 80th% is more of a 3.3 - 3.5 depending upon the rigor of the institution. But I wouldn't worry about the conversation - %-ile is good enough for now. Work experience is quite standard - nothing really stands out. Same feedback on the involvement - generic statements noting participation. You should note that you're going up against applicants who have started their own volunteer organizations or people who have been leading meaningful causes for several years. If you've been doing similar work, that is great, you just need to be more specific.
I think all of the schools on your list fall in the stretch category. If you achieve a score of 730+ I could support an application to one of these, but it's a tough road ahead given the information you shared. There are plenty of top programs in the top 20 in the US that will give you a great shot at a product manager role in tech. Take a look at some of our rankings for
marketing/product management here. Here are also some of our thoughts on
school selection.