For your pitch, I'd recommend keeping it simple and picking one target market. The market should be large enough such that you won't "run out of market" if you're successful. There's a big difference as well between a new solution in an established market vs. a completely new market (hint: the latter puts the burden on you to show that there is actually a market/willingness to pay for a solution to an unrecognized problem.)
If you have multiple potential target markets, it's OK for you to track them (this will come in handy in case of a pivot) but I would recommend you devote 95% of your energy to establishing an initial foothold in the easiest market. It's much easier to expand from there to other markets.
Lastly, beware of just quoting analyst reports, at least without understanding in pretty good detail what exactly they're measuring. You may need to read the analyst notes, or possibly look at the raw data (if available) to figure this out. If you happen to run into a detail-oriented investor who questions the number, you want to be prepared to defend it ... and then move on.
In any case, you shouldn't spend too much time on this IMO. Many/most investors are weary of these numbers, which always have a very large TAM and an unreasonably large SAM (for an early stage startup.)