Rangers have a lot of work to do this summer if they are to get back to where they want to be in Scottish football. A dreadful transfer window last year is arguably what set them back so much this season, some of the fall-out having a massive impact on morale at the club.

High profile signings like Joey Barton simply didn't work out and the likes of Joe Garner, who cost a fair bit of money, didn't live up to their price tag.

Assuming that Rangers chief Dave King follows through on his promise of investment this summer, Pedro Caixinha has an interesting few months ahead as he decides what kind of team he wants to assemble.

Whether he uses his contacts on the continent, in Mexico or in the Middle East remains to be seen, we could see players from all over the world arrive. That uncertainty about players is always exciting for fans but we reckon supporters might appreciated some more well known names coming to Ibrox.

Here are four players currently doing the business in Scottish football that we feel Rangers need in order to improve...

Jamie Walker

Currently having a fantastic season at Hearts, Jamie Walker would be a good shout for Player Of The Year awards if Celtic had not been so dominant this season.

Scoring a massive 15 goals, he's been the driving force behind everything good at the Tynecastle club this season. Admittedly their season has gone off the rails but the 23 year old has shown enough about him that it would be a near certainty he'd be a success at Ibrox.

His dynamic displays in attacking midfield would give Rangers a cutting edge they simply don't possess right now. Walker has a ruthlessness that makes fantastic players stand out from the ordinary and surrounded by even better players in Glasgow, could have a monster season next term.

Jason Cummings

Everyone is expecting Jason Cummings to make the next step up in his career sometime soon after a four season spell with Hibernian. Three of those have been spent in the Championship and in that time Cummings has forged a reputation for himself as one of the deadliest strikers in Scotland.

He's scored 20+ goals for the third successive season while, of course, it has been against lower league competition, nobody would bet against him replicating that in the Scottish Premiership next season whether with it's the about-to-be promote Hibs or with a team like Rangers.

He could even be destined for a move to English football but the Gers should show ambition and make their move to replace the ageing Kenny Miller, another player that a long time ago you'll remember they also signed from the Easter Road club.

Callum Paterson

Currently out with a lengthy injury, Callum Paterson has been one of Hearts most impressive prospects over the last few years and is tipped to have a big future in the game.

His contract is up at the end of the season and despite talks with the Tynecastle club, has yet to agree terms on a new deal.

He would be an excellent and solid option on the right hand side to replace James Tavernier, who Rangers fans are growing increasingly impatient with after a series of indisciplined displays at right-back.

Paterson also has a natural tendency to attack from that position but has the discipline to also be an effective force in defence, something noted by Scotland manager Gordon Strachan, who has given the 22 year international caps.

On a free, he could be a very fine acquisition on the cheap, allowing Caixinha to use resources to strengthen in more areas of the team.

John McGinn

Like Jason Cummings, John McGinn is hailed as one of the top prospects in Scottish football despite plying his trade in the Scottish Championship with Hibs. He is undoubtedly capable of playing beyond that level and like another player on this list, Callum Paterson, has been given caps by Scotland manager Gordon Strachan.

Hibs are unlikely to want to give him up given his importance to their team, he is the beating heart of Neil Lennon's side, however the pull of Rangers is strong, even though they've had a dire season and the chance to play in front of 50,000 fans every week could be tempting for the young Scot.

He's definitely a player that could bring Pedro Caixinha's team to the next level in the middle of the park.