This ship has sailed and for good reason. Griezmann's best position is the same as Bruno and while it could be argued they are at similar levels, one is only going to get better and the other worse. Both at Atletico and France, he plays behind a front man. He's an exceptional player, just not suitable for us. Buying the players that fit the system, rather than the other way around is what has made Liverpool so successful and something we can honestly learn after the Sanchez fiasco (another player for the LW, when our RW was the pressing need)
On Barca players I would take, maybe a cheeky loan with an option to buy for Dembele? There's a serious player in there and he would fit like a glove in our counterattacking system on the RW. Obviously there are the injury concerns, but can be mitigated by the loan option.