If it's a complete WC base then the Steinitz v Zugertort and Lasker are good.
Lasker v Tarrasch is enthralling. Alekhine v Euwe (find the The Pearl of Zandvoort).
The things you find in these old games is bread and butter knowledge to GM's
and IM's so much so often when they note up a game they take it for granted
the reader knows what they know.
Consequently you get the 'Whoosh right over your head' effect.
Take a stroll in the history chess when the Evans Gambit was
regular fare in a WC match.
Here is the Pearl of Zandvoort/ Euwe v Alekhine. 1935.
Watch Euwe's Kings's Knight win this game. It makes 20 of the 47 moves.