So, pretty self-explanatory this one, I think! Those guys who take you a good while to figure out which foot they prefer. Or, in the case of one (admittedly obvious) current example, Ousmane Dembélé, guys who appear to be able to use both equally well, and don't seem to have a preference. I just watched an old clip of the '66 Libertadores final to assess one candidate I'd heard described as "ambidextrous", Alberto Spencer, and he was pretty clearly right-footed. Not that we need to be overly picky, though, so we can content ourselves with those for whom we know which foot they prefer but who do a pretty remarkable job with their weaker one (top of mind example: Robin van Persie - clearly left-footed, but a terrific finisher with both [including really difficult finishes like volleys and half-volleys]).
First nomination: Michael Ballack. Definitely not ambidextrous (he was clearly right-footed) but had terrific power and accuracy with his left.
But to kick it up another gear entirely: Andreas Brehme - probably the most two-footed player I think I've ever seen. Anyone who says that they feel as if they have more power in one foot (in Brehme's case, his left) but more accuracy with the other (hence his WC-winning penalty in Italia '90) is pantheon-level.
Two ambidextrous records in the Transfermarkt database: Nedved has 47 goals with his right foot and 27 with his left. (63% x 37%) Forlan has 70 goals with his right foot and 51 goals with his left foot (57% x 43%) As far as I remember they are the two most balanced. But if you search transfermaket you can find better records in their database. A recent ambidextrous is CR7. Ronaldo has 251 on the right and 111 on the left. 69% x 31%. A famous case is that of Marcial Pina, who in 1978 scored two free-kicks in the same match against Barcelona, with his feet switched. Another who did the same thing was Simone Verdi (bologna) against Crotone in 2017/2018. Two free kicks, one with each foot. There is also the perfect hattrick (a goal with each leg and one with the head), which many do in a season, but it doesn't mean that the player is ambidextrous.
I think that more than 30% could be considered with being ambidextrous (but there are other factors, such as efficiency, etc.). Dembele had this cool stats in 2021 28 - Ousmane Dembélé 🇫🇷 has scored 28 goals for @FCBarcelona in all competitions, 14 with his left foot and 14 with his right. Ambidextrous. pic.twitter.com/R1VCp632HY— OptaJose (@OptaJose) March 21, 2021 Now he has 24 with the left and 27 with the right. (47% x 53%). Equal to Forlan. Perisic had this weird stats in 2021 1 - Ivan #Perisic is the first Serie A player to score a right-footed penalty goal and to score a left-footed penalty goal since 2004/05 (since Opta collected this kind of data). Ambidextrous.#LazioInter pic.twitter.com/dByGRuLeoE— OptaPaolo (@OptaPaolo) October 16, 2021
He was certainly pretty extraordinary; one of only a tiny handful I've ever seen who'd switch feet to take corners from both sides, Perisic being another.
I'd like to read more than just goals scored. - Kicking - Ball control - Passing (short and long) - Playing 1-2s - Tackling - Running with the ball
Absolutely agree with you, msioux. Probably a good example of an incredibly two-footed player who I barely remember scoring any goals at all (except occasionally with his head) would be Paolo Maldini - whose ambidexterity came through in everything else he did, including his tackling, crossing and passing. I only realised that he had a slight preference for his right foot when I saw him take a free-kick with it.
Here's another: Morten Gamst Pedersen - who, if memory serves, was naturally right-footed, but worked on his left to a point where he preferred it under many circumstances (including for the taking of corners and free-kicks).