Best card for large purchases in next 90 days

Looking for card that give me best rewards in short period of time. Will be making about 70-80k in transactions over the upcoming couple of months.

We use the Rogers WE card but limit is annoying at about 10k and we always need to prepay to get higher limit.

Need something that gives high reward so I can take most reward maximization for these transactions. No preference if cash back or travel.