Best credit card for flights/hotel/vacation purchases

Hi all:

I want to get your opinion on which credit card gives the best rewards when used for travel purchases (which is probably where I spend the most each year).
Since a lot of time the points to dollars isn’t one to one, so it can be quite confusing and misleading (like bmo world elite).

These are the ones I have and I used for different scenario.

HSBC world elite seems to be the best versatile travel card that earns 3% back doesn’t matter where I book (sometimes I get additional 10% discount on Expedia when booking with HSBC). Overall it’s a good card but their banking experience sucks.

TD first class also gives 4.5% back when book and spend through expediafortd, which is fine for most part but may not be best when I want to book a cruise. Also, this card doesn’t provide any additional incentives for renewing after FYF.

PC World Elite is similar to TD with 3% when book through pc travel but I found their booking system not very good (many offers from Expedia doesn’t show up). It does have additional discounts sometimes on top of the 3% back.

WestJet only gives 2% back even booking though WestJet (Sad), I really want to use them more but it’s decent for spending on everything else (1.5%) but not on travel. Thank god u don’t need to charge the trip to get free checked in luggage.

There are other cards from scotia bank, bmo and CIBC that seems to be good travel cards but not necessarily best to make travel purchases.

Can anyone provides any additional knowledge on other good travel cards (turn them into %back (instead of pts that isn’t 1 to 1 with dollars), especially American Express and airmile cards (I’m done with Aeroplan when they removed all my points last year)

Thanks.