Everton are in discussions to sign Crystal Palace midfielder Yannick Bolasie and Sunderland defender Lamine Kone, as they close in on a deal for Wales captain Ashley Williams.
Swansea centre-half Williams, 31, is having a medical before a £12m move to Goodison Park.
Fellow centre-half John Stones moved from Everton to Manchester City for £47.5m earlier on Tuesday.
The trio would become the first major signings for new manager Ronald Koeman.
Twenty-seven-year-old DR Congo international Bolasie, who joined Palace from Bristol City in 2012, has scored nine goals in 89 Premier League appearances.