I think there are a number of ways.
1) Get an big mofo ala Carroll - and cross/play the ball into him - percentage football. I'm not really a fan of this approach. A bit hit and miss.
2) Get an uber clinical striker ala Van Nistelrooy - not many of these knocking around and I don't think with the rest of our players, having 10 players + a finisher would work under a Klopp system. The "gengen press" relies on a hard working number 9. Only Lewandoski probably fits this mould now and he's slowing down.
3) Get a very creative all round CF who works hard and can create goals/chance by himself ala Suarez. There is only one Suarez. He plays for Barca now. Maybe if he wins another CL and La Liga he'll get bored and come back? We can only dream.
4) Buy more players who can beat a man in 1v1 situations ala a Mane/Sanchez. When you have a Mane/Sanchez, you can unbalance an organised defence as they get pulled out of position trying to double up. As if you need to double up on a Mane, then there's a spare man elsewhere. If you have 2 or 3 Manes', across the course of a 90minute game, that extra work you need to put in to cover a threat wears on you and you're susceptible to conceding late goals.
Currently in our first team 16 we have:
Mane and a confident Coutinho (when on form) who teams might double up on. We need a couple more players in this mould. When we almost won the title we had Coutinho, Suarez, Sterling, Sturridge (when he had legs), even GlenJo could drop a shoulder and dribble.
Chelsea currently have Moses, Hazard, Costa, Pedro, Willian.
Arsenal have Sanchez, Walcott, Wellbeck, Bellerin, Chamberlain, and to a lesser extent Ramsey.
City have Sterling, Sane, KDB, Aguero, now Jesus, Silva and back when he had legs Yaya was a beast.
I think this an area we are severely lacking genuine quality. Clyne isn't technical enough. Wynaldum seems to have an ability to drive but not the confidence. Lallana is tricky has great feet to create half a yard to get an opponent off balance but doesn't go past players in a way a David Silva glides past them (a player of comparable speed). Firmino is another with great skill but not the burst of pace to get away from anyone nor the close dribbling action to beat a player consistently.
I think looking at the balance of our team, there's a lot of room for improvement in this area at LB, LW and CF. The LB needs to be either be a kick and run speed merchant like Bellerin. Or a tricky quick failed winger type like a Van Aanholt. Preferably strong defensively and in the air too. Moreno tries to be the former but isn't as quick nor has any brains for defending whatsoever.
The LW needs to offer an alternative to Coutinho (who will be played at AM) in such games. A close of Mane on the left. This needs to be the summer marquee signing. Reus any good still?
The CF needs to offer 1v1 abilty as well as clinical finishing. Any chance on Aubameyang?