Ally McCoist's side trail SPL leaders Celtic by a whopping 18 points, although they were deducted 10 points for going into administration last month.
Sunday's 3-2 Old Firm victory at Ibrox prevented the Hoops from claiming their 43rd league title with seven games remaining.
Sone Aluko, Andy Little and Lee Wallace all hit the target for the home side despite a late penalty from Scott Brown and a stoppage-time header from Thomas Rogne setting up a nervy final few minutes for the Ibrox side.
Neil Lennon's team can still clinch the title next Sunday if they beat St Johnstone providing Rangers do not beat Motherwell on Saturday.
But the Northern Ireland frontman is adamant that the result proves the Gers are still the best team in the SPL, telling the Daily Record: "Despite all that's happened this season, on our day Rangers are still the best team in Scotland.
"Celtic can sign whoever they want but we'll still have the best young players and the best older players.
"We're the best team and we play the best football. When the going gets tough we're always there. When we're the underdogs we come out on top every time. No matter what people put in front of us we always stand up and be counted.
"We proved on Sunday what we're all about. We're definitely still the best team in Scotland and I don't think that will change for a few years.
"If Celtic had won on Sunday they'd have won the league but we weren't going to let that happen.
"That was probably the best game we've played this season. We have young players ready to take their chance. Rhys McCabe was my man of the match and there are a few like him.
"This season will be a one-off and we'll be back. We've had some bad results in recent weeks but I'm pretty sure we'll finish second and prove to everyone we're already looking forward to next season."